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Artykuły w czasopismach na temat „Muscle power”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 25 lipca 2025

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1

Josephson, R. K. "Dissecting muscle power output." Journal of Experimental Biology 202, no. 23 (1999): 3369–75. http://dx.doi.org/10.1242/jeb.202.23.3369.

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The primary determinants of muscle force throughout a shortening-lengthening cycle, and therefore of the net work done during the cycle, are (1) the shortening or lengthening velocity of the muscle and the force-velocity relationship for the muscle, (2) muscle length and the length-tension relationship for the muscle, and (3) the pattern of stimulation and the time course of muscle activation following stimulation. In addition to these primary factors, there are what are termed secondary determinants of force and work output, which arise from interactions between the primary determinants. The

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2

Martin, James C. "Muscle Power." Exercise and Sport Sciences Reviews 35, no. 2 (2007): 74–81. http://dx.doi.org/10.1097/jes.0b013e31803eb0a0.

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Leonard, Patrick. "Muscle power." New Scientist 193, no. 2592 (2007): 23. http://dx.doi.org/10.1016/s0262-4079(07)60473-4.

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Carson, Louise. "Muscle power." Equine Health 2011, no. 2 (2011): 16–18. http://dx.doi.org/10.12968/eqhe.2011.1.2.16.

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Blake, Ollie M., and James M. Wakeling. "Muscle coordination limits efficiency and power output of human limb movement under a wide range of mechanical demands." Journal of Neurophysiology 114, no. 6 (2015): 3283–95. http://dx.doi.org/10.1152/jn.00765.2015.

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This study investigated the influence of cycle frequency and workload on muscle coordination and the ensuing relationship with mechanical efficiency and power output of human limb movement. Eleven trained cyclists completed an array of cycle frequency (cadence)-power output conditions while excitation from 10 leg muscles and power output were recorded. Mechanical efficiency was maximized at increasing cadences for increasing power outputs and corresponded to muscle coordination and muscle fiber type recruitment that minimized both the total muscle excitation across all muscles and the ineffect

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6

Josephson, R. "Power output from a flight muscle of the bumblebee Bombus terrestris. II. Characterization of the parameters affecting power output." Journal of Experimental Biology 200, no. 8 (1997): 1227–39. http://dx.doi.org/10.1242/jeb.200.8.1227.

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1. Length-tension relationships and work output were investigated in the intact, dorso-ventral flight muscle of the bumblebee Bombus terrestris. The muscle is an asynchronous muscle. Like other asynchronous flight muscles, it has high resting stiffness and produces relatively low active force in response to tetanic stimulation. 2. The muscle shows shortening deactivation and stretch activation, properties that result in delayed force changes in response to step changes in length, a phase lag between force and length during imposed sinusoidal strain and, under appropriate conditions, positive w

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Fadhilah Ilmi, Dhiki, and Wahyuni. "Effects of Plyometric Zig-Zag Run and Single Leg Speed Hop Exercises on Agility and Leg Muscles Explosive Power in Football Players." Indonesian Journal of Medicine 9, no. 1 (2024): 33–38. http://dx.doi.org/10.26911/theijmed.2024.09.01.05.

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Background: Futsal is a ball game played by each of 5 people. With the aim of putting the ball into the opponent's goal. Agility and explosive power are required, plyometrics are used to increase lower body muscle power and increase explosive power by training muscles to perform more movements in a shorter time. This study aimed to determine the effects of plyometric zig-zag run and single leg speed hop exercises on increasing agility and leg muscle explosive power in futsal players. Subject and Method: This was a quasi experiments with no control group. The study was carried out in Kendal, Ce

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Fadhilah Ilmi, Dhiki, and Wahyuni. "Effects of Plyometric Zig-Zag Run and Single Leg Speed Hop Exercises on Agility and Leg Muscles Explosive Power in Football Players." Indonesian Journal of Medicine 9, no. 1 (2024): 33–38. https://doi.org/10.26911/theijmed.2024.9.1.713.

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Background: Futsal is a ball game played by each of 5 people. With the aim of putting the ball into the opponent's goal. Agility and explosive power are required, plyometrics are used to increase lower body muscle power and increase explosive power by training muscles to perform more movements in a shorter time. This study aimed to determine the effects of plyometric zig-zag run and single leg speed hop exercises on increasing agility and leg muscle explosive power in futsal players. Subject and Method: This was a quasi experiments with no control group. The study was carried out in Kendal, Ce

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Bogey, Ross. "An EMG-to-Force Processing Method for Estimating In Vivo Knee Muscle Power During Self-Selected Speed Walking in Adults." Applied Sciences 15, no. 12 (2025): 6849. https://doi.org/10.3390/app15126849.

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The purpose of this study was to determine the power produced by knee muscles in normal adults when performing self-selected walking. The power of a single knee muscle is not directly measurable without invasive methods. An EMG-to-force processing (EFP) model was developed, which scaled muscle–tendon unit (MTU) power output to gait EMG. Positive power by each muscle occurred when force was developed during concentric contractions, and negative power occurred with lengthening contractions. The sum of EFP power produced by knee muscles was compared with the kinematics plus kinetics (KIN) knee po

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Askew, Graham N., and Richard L. Marsh. "Muscle designed for maximum short-term power output: quail flight muscle." Journal of Experimental Biology 205, no. 15 (2002): 2153–60. http://dx.doi.org/10.1242/jeb.205.15.2153.

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SUMMARYTake-off in birds at high speeds and steep angles of elevation requires a high burst power output. The mean power output of the pectoralis muscle of blue-breasted quail (Coturnix chinensis) during take-off is approximately 400 W kg-1 muscle, as determined using two independent methods. This burst power output is much higher than has been measured in any other cyclically contracting muscle. The power output of muscle is determined by the interactions between the physiological properties of the muscle, the stimulation regime imposed by the central nervous system and the details of the str

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11

Peplowski, M. M., and R. L. Marsh. "Work and power output in the hindlimb muscles of Cuban tree frogs Osteopilus septentrionalis during jumping." Journal of Experimental Biology 200, no. 22 (1997): 2861–70. http://dx.doi.org/10.1242/jeb.200.22.2861.

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It has been suggested that small frogs use a catapult mechanism to amplify muscle power production during the takeoff phase of jumping. This conclusion was based on an apparent discrepancy between the power available from the hindlimb muscles and that required during takeoff. The present study provides integrated data on muscle contractile properties, morphology and jumping performance that support this conclusion. We show here that the predicted power output during takeoff in Cuban tree frogs Osteopilus septentrionalis exceeds that available from the muscles by at least sevenfold. We consider

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Konow, Nicolai, Emanuel Azizi, and Thomas J. Roberts. "Muscle power attenuation by tendon during energy dissipation." Proceedings of the Royal Society B: Biological Sciences 279, no. 1731 (2011): 1108–13. http://dx.doi.org/10.1098/rspb.2011.1435.

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An important function of skeletal muscle is deceleration via active muscle fascicle lengthening, which dissipates movement energy. The mechanical interplay between muscle contraction and tendon elasticity is critical when muscles produce energy. However, the role of tendon elasticity during muscular energy dissipation remains unknown. We tested the hypothesis that tendon elasticity functions as a mechanical buffer, preventing high (and probably damaging) velocities and powers during active muscle fascicle lengthening. We directly measured lateral gastrocnemius muscle force and length in wild t

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Faulkner, J. A., E. Zerba, and S. V. Brooks. "Muscle temperature of mammals: cooling impairs most functional properties." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 259, no. 2 (1990): R259—R265. http://dx.doi.org/10.1152/ajpregu.1990.259.2.r259.

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Our purpose was to study the effect of a decrease in skeletal muscle temperature on single and repeated shortening, isometric, and lengthening contractions of mammalian skeletal muscles. Fast extensor digitorum longus muscles of mice were studied in situ and in vitro at 25 and 35 degrees C. No difference in isometric force was observed, but maximum and sustained powers were reduced by 40 and 62%, respectively. With cooling, maximum power absorption, which is proportional to the external work required to lengthen the muscle, increased significantly at each velocity of lengthening from 0.5 to 4.

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Sponberg, S., and T. L. Daniel. "Abdicating power for control: a precision timing strategy to modulate function of flight power muscles." Proceedings of the Royal Society B: Biological Sciences 279, no. 1744 (2012): 3958–66. http://dx.doi.org/10.1098/rspb.2012.1085.

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Muscles driving rhythmic locomotion typically show strong dependence of power on the timing or phase of activation. This is particularly true in insects' main flight muscles, canonical examples of muscles thought to have a dedicated power function. However, in the moth ( Manduca sexta ), these muscles normally activate at a phase where the instantaneous slope of the power–phase curve is steep and well below maximum power. We provide four lines of evidence demonstrating that, contrary to the current paradigm, the moth's nervous system establishes significant control authority in these muscles t

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Hilton, Tiffany N., Lori J. Tuttle, Kathryn L. Bohnert, Michael J. Mueller, and David R. Sinacore. "Excessive Adipose Tissue Infiltration in Skeletal Muscle in Individuals With Obesity, Diabetes Mellitus, and Peripheral Neuropathy: Association With Performance and Function." Physical Therapy 88, no. 11 (2008): 1336–44. http://dx.doi.org/10.2522/ptj.20080079.

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Background and Purpose The primary purpose of this study was to report differences in calf intermuscular adipose tissue (IMAT), muscle strength (peak torque), power, and physical function in individuals with obesity, diabetes mellitus (DM), and peripheral neuropathy (PN) compared with those without these impairments. A secondary purpose was to assess the relationship between IMAT and muscle strength, power, and physical function. Subjects and Methods Six participants with obesity, DM, and PN (2 women, 4 men; mean age=58 years, SD=10; mean body mass index=36.3, SD=5; mean modified Physical Perf

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16

Roberts, Thomas J., Emily M. Abbott, and Emanuel Azizi. "The weak link: do muscle properties determine locomotor performance in frogs?" Philosophical Transactions of the Royal Society B: Biological Sciences 366, no. 1570 (2011): 1488–95. http://dx.doi.org/10.1098/rstb.2010.0326.

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Muscles power movement, yet the conceptual link between muscle performance and locomotor performance is poorly developed. Frog jumping provides an ideal system to probe the relationship between muscle capacity and locomotor performance, because a jump is a single discrete event and mechanical power output is a critical determinant of jump distance. We tested the hypothesis that interspecific variation in jump performance could be explained by variability in available muscle power. We used force plate ergometry to measure power produced during jumping in Cuban tree frogs ( Osteopilus septentrio

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Josephson, R. "Power output from a flight muscle of the bumblebee Bombus terrestris. III. Power during simulated flight." Journal of Experimental Biology 200, no. 8 (1997): 1241–46. http://dx.doi.org/10.1242/jeb.200.8.1241.

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1. The work loop approach was used to measure mechanical power output from an asynchronous flight muscle, the dorso-ventral muscle of the bumblebee Bombus terrestris. Measurements were made at the optimum muscle length for work output at 30 &deg;C and at a muscle temperature (40 &deg;C) and oscillatory frequency (141&shy;173 Hz, depending on the size of the animal) characteristic of free flight. Oscillatory strain amplitude was adjusted to maximize power output. 2. There was much preparation-to-preparation variability in power output. Power output in the muscles with the highest va

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Wakeling, J. M., K. M. Kemp, and I. A. Johnston. "The biomechanics of fast-starts during ontogeny in the common carp cyprinus carpio." Journal of Experimental Biology 202, no. 22 (1999): 3057–67. http://dx.doi.org/10.1242/jeb.202.22.3057.

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Common carp Cyprinus carpio L. were reared a constant temperature of 20 degrees C from the larval (7 mm total length) to the juvenile (80 mm) stage. Body morphology and white muscle mass distribution were measured. Fast-start escape responses were recorded using high-speed cinematography from which the velocities, accelerations and hydrodynamic power requirements were estimated. All three measures of fast-start performance increased during development. White muscle contraction regimes were calculated from changes in body shape during the fast-starts and used to predict the muscle force and pow

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Wen, Fangfang, and Shujun Yang. "Equipment-assisted training to improve the explosiveness and agility of football players." Molecular & Cellular Biomechanics 22, no. 3 (2025): 1399. https://doi.org/10.62617/mcb1399.

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Main: Football players need to release power in a short time when they dribble or shoot quickly, so they need explosive power. Explosive power comes from muscle strength, and muscle strength comes from muscle mass. Result: Football players can increase leg muscle mass to increase the upper limit of muscle strength, the upper limit of explosive power, and the upper limit of jumping ability. Discussion: Agility ladder training (rope ladder) is mainly used to practice coordination, balance and agility. It can enhance the speed of lateral displacement, and also enable the feet to move faster and i

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McNitt-Gray, Jill L. "Human Muscle Power." International Journal of Sport Biomechanics 4, no. 2 (1988): 178–79. http://dx.doi.org/10.1123/ijsb.4.2.178.

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Reid, Kieran F., and Roger A. Fielding. "Skeletal Muscle Power." Exercise and Sport Sciences Reviews 40, no. 1 (2012): 4–12. http://dx.doi.org/10.1097/jes.0b013e31823b5f13.

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Umam, Choirul, Oce Wiriawan, and Edy Mintarto. "EFFECT OF EXERCISE BENCH PRESS AND SITTING CALF WITH CHEST PRESS AND LEG PRESS TO POWERARM MUSCLE AND POWER LIMB MUSCLES." JIPES - JOURNAL OF INDONESIAN PHYSICAL EDUCATION AND SPORT 3, no. 2 (2017): 57–69. http://dx.doi.org/10.21009/jipes.032.05.

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This research aims to examine:1) How big the effectofbench press and sitting calf exercises to arm muscle power and leg muscle power; 2) How big the effect of chest press and leg press exercises to arm muscle power and leg muscle power; 3)How big the effect difference between bench press and sitting calf exercises and chest press and leg press exercises to to arm muscle power and leg muscle power. Research subject was boy student of SMA Negeri 1 Manyar as many 36 students, with age span 15-17 years which divided to three groups. Experiment group I received bench press and sitting calf while th

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Tan, Ming A., Franz K. Fuss, and Dhanjoo Ghista. "Muscle Power Indexing for Sports Applications(Sports Biomechanics)." Proceedings of the Asian Pacific Conference on Biomechanics : emerging science and technology in biomechanics 2004.1 (2004): 205–6. http://dx.doi.org/10.1299/jsmeapbio.2004.1.205.

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Roberts, Thomas J., and Emanuel Azizi. "The series-elastic shock absorber: tendons attenuate muscle power during eccentric actions." Journal of Applied Physiology 109, no. 2 (2010): 396–404. http://dx.doi.org/10.1152/japplphysiol.01272.2009.

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Elastic tendons can act as muscle power amplifiers or energy-conserving springs during locomotion. We used an in situ muscle-tendon preparation to examine the mechanical function of tendons during lengthening contractions, when muscles absorb energy. Force, length, and power were measured in the lateral gastrocnemius muscle of wild turkeys. Sonomicrometry was used to measure muscle fascicle length independently from muscle-tendon unit (MTU) length, as measured by a muscle lever system (servomotor). A series of ramp stretches of varying velocities was applied to the MTU in fully activated muscl

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Ellington, C. P. "Power and efficiency of insect flight muscle." Journal of Experimental Biology 115, no. 1 (1985): 293–304. http://dx.doi.org/10.1242/jeb.115.1.293.

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The efficiency and mechanical power output of insect flight muscle have been estimated from a study of hovering flight. The maximum power output, calculated from the muscle properties, is adequate for the aerodynamic power requirements. However, the power output is insufficient to oscillate the wing mass as well unless there is good elastic storage of the inertial energy, and this is consistent with reports of elastic components in the flight system. A comparison of the mechanical power output with the metabolic power input to the flight muscles suggests that the muscle efficiency is quite low

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Suharjana, Suharjana, Eko Priyanto, and Japhet Ndayisenga. "Contribution of Leg Power, Arm Power, Stomach Muscle Power, and Back Muscle Power on Jumping Services." International Journal of Human Movement and Sports Sciences 8, no. 5 (2020): 240–48. http://dx.doi.org/10.13189/saj.2020.080512.

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James, Rob S., Robbie S. Wilson, and Graham N. Askew. "Effects of caffeine on mouse skeletal muscle power output during recovery from fatigue." Journal of Applied Physiology 96, no. 2 (2004): 545–52. http://dx.doi.org/10.1152/japplphysiol.00696.2003.

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The effects of 10 mM (high) and 70 μM (physiologically relevant) caffeine on force, work output, and power output of isolated mouse extensor digitorum longus (EDL) and soleus muscles were investigated in vitro during recovery from fatigue at 35°C. To monitor muscle performance during recovery from fatigue, we regularly subjected the muscle to a series of cyclical work loops. Force, work, and power output during shortening were significantly higher after treatment with 10 mM caffeine, probably as a result of increased Ca2+ release from the sarcoplasmic reticulum. However, the work required to r

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Hikmad Hakim, Anto Sukamto, Rahma Dewi, and Nurkadri. "Relationship of Power, Waist Muscle Flexibility, and Power Muscle Legs Against Smash Volleyball For FIK UNM Makassar Students." Kinestetik : Jurnal Ilmiah Pendidikan Jasmani 6, no. 3 (2022): 560–67. http://dx.doi.org/10.33369/jk.v6i3.23732.

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Power Leg Muscle Power volleyball for FIK UNM Makassar students. The sample used in this study were FIK UNM Makassar students who took volleyball courses. Data analysis techniques used to test the hypothesis are normality test, linearity test, and correlation test. From the results of the first hypothesis correlation test, a significance value of 0.046 < 0.05 was obtained, so there was a significant relationship between power arm muscle smash. The results of the second hypothesis test have a significance value of 0.037 < 0.05, so there is a significant relationship between Waist Muscle F

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Rome, L. C., D. M. Swank, and D. J. Coughlin. "The influence of temperature on power production during swimming. II. Mechanics of red muscle fibres in vivo." Journal of Experimental Biology 203, no. 2 (2000): 333–45. http://dx.doi.org/10.1242/jeb.203.2.333.

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We found previously that scup (Stenotomus chrysops) reduce neither their stimulation duration nor their tail-beat frequency to compensate for the slow relaxation rates of their muscles at low swimming temperatures. To assess the impact of this ‘lack of compensation’ on power generation during swimming, we drove red muscle bundles under their in vivo conditions and measured the resulting power output. Although these in vivo conditions were near the optimal conditions for much of the muscle at 20 degrees C, they were far from optimal at 10 degrees C. Accordingly, in vivo power output was extreme

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Santos, Paulo D. G., João R. Vaz, Paulo F. Correia, Maria J. Valamatos, António P. Veloso, and Pedro Pezarat-Correia. "Muscle Synergies Reliability in the Power Clean Exercise." Journal of Functional Morphology and Kinesiology 5, no. 4 (2020): 75. http://dx.doi.org/10.3390/jfmk5040075.

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Muscle synergy extraction has been utilized to investigate muscle coordination in human movement, namely in sports. The reliability of the method has been proposed, although it has not been assessed previously during a complex sportive task. Therefore, the aim of the study was to evaluate intra- and inter-day reliability of a strength training complex task, the power clean, assessing participants’ variability in the task across sets and days. Twelve unexperienced participants performed four sets of power cleans in two test days after strength tests, and muscle synergies were extracted from ele

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Iskandar, Risfan, Oce Wiriawan, and Sapto Wibowo. "Increasing Arm Muscle Strength and Power with Dumbbell Exercise Variations." Jurnal Maenpo : Jurnal Pendidikan Jasmani Kesehatan dan Rekreasi 13, no. 1 (2023): 90. http://dx.doi.org/10.35194/jm.v13i1.3253.

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The problem of this research is the lack of exercise to increase the strength and power of the arm muscles. The aim of this research is to find out whether there is an effect of dumbbell training on the strength and power of the arm muscles. The subjects of this research were 40 members of the UNDIKMA Badminton UKM. The method used in this research is quasi-experimental with a quantitative approach. Nonequivalent Control Group Design data collection. This research uses the measurement of arm muscle strength with an expanding dynamometer and arm muscle power using a two hand medicine ball put.

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Koloway, Christie Brenda Gabriella, Joshua Runtuwene, and Fima Lanra Fredrik Gerald Langi. "Kekuatan Otot Perut, Daya Ledak Otot Lengan, Tinggi Lompatan dan Hasil Pukulan Smash Penuh pada Atlet Bulutangkis." Sam Ratulangi Journal of Public Health 2, no. 1 (2021): 022. http://dx.doi.org/10.35801/srjoph.v2i1.33887.

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Background: Badminton is one of the most popular sports in the world, including in Indonesia. Badminton has been around since the 1930s. The strength of the abdominal muscles contributes to a full smash during hitting. Explosive power is an important biometric ability in sports activities, because the explosive power will determine how hard people can hit, kick, jump, run and so on. Jump height is a component of physical fitness to measure leg muscle power. The purpose of this study was to analyze the correlation between abdominal muscle strength, arm muscle explosive power, jump height and th

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Achwan, Achwan, Siti Najiahtul Hasanah, and Ari Sudarsono. "Single Leg Speed Hop Pengaruh Single Leg Speed Hop Terhadap Daya Ledak Otot Tungkai Pada Pesilat." Jurnal Fisioterapi dan Kesehatan Indonesia 2, no. 2 (2022): 108–16. http://dx.doi.org/10.59946/jfki.2022.131.

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ABSTRACT Background: The explosive power of leg muscle is the ability to exert maximum power in the shortest possible time. Muscle explosive power is important for a fighter in locking, swinging, dropping, punching, kicking and avoiding attacks from unexpected angles and directions. Ways to increase muscle explosive power include plyometric training and one of them is single leg speed hops. Research Objectives: To determine the effect of single leg speed hop pliometric exercises on increasing the explosive power of limb muscles in pesilat members at SMPN 1 Parung. Research Methods: The d

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Josephson, Robert K., Jean G. Malamud, and Darrell R. Stokes. "The efficiency of an asynchronous flight muscle from a beetle." Journal of Experimental Biology 204, no. 23 (2001): 4125–39. http://dx.doi.org/10.1242/jeb.204.23.4125.

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SUMMARYMechanical power output and metabolic power input were measured from an asynchronous flight muscle, the basalar muscle of the beetle Cotinus mutabilis. Mechanical power output was determined using the work loop technique and metabolic power input by monitoring CO2 production or both CO2 production and O2 consumption. At 35°C, and with conditions that maximized power output (60 Hz sinusoidal strain, optimal muscle length and strain amplitude, 60 Hz stimulation frequency), the peak mechanical power output during a 10 s burst was approximately 140 W kg–1, the respiratory coefficient 0.83 a

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James, R. S., V. M. Cox, I. S. Young, J. D. Altringham, and D. F. Goldspink. "Mechanical properties of rabbit latissimus dorsi muscle after stretch and/or electrical stimulation." Journal of Applied Physiology 83, no. 2 (1997): 398–406. http://dx.doi.org/10.1152/jappl.1997.83.2.398.

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James, R. S., V. M. Cox, I. S. Young, J. D. Altringham, and D. F. Goldspink Mechanical properties of rabbit latissimus dorsi muscle after stretch and/or electrical stimulation. J. Appl. Physiol. 83(2): 398–406, 1997.—The work loop technique was used to measure the mechanical performance in situ of the latissimus dorsi (LD) muscles of rabbits maintained under fentanyl anesthesia. After 3 wk of incrementally applied stretch the LD muscles were 36% heavier, but absolute power output (195 mW/muscle) was not significantly changed relative to that of external control muscle (206 mW). In contrast, co

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Ferris, Scott, and Simon Maciburko. "Intercostal Nerve Transfers to Native Triceps or Free Muscle Flaps for Elbow Extension in Brachial Plexus Injuries." Journal of Brachial Plexus and Peripheral Nerve Injury 19, no. 01 (2024): e1-e5. http://dx.doi.org/10.1055/s-0043-1778063.

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AbstractIntercostal nerve donors for traumatic brachial plexus injury reconstruction have been used to neurotize native muscles or free-functioning muscle transfers, with inconsistent outcomes reported. The aim was to record a substantial series, evaluate functional outcomes, and identify prognostic factors. We present a single-surgeon case series of 21 consecutive patients who underwent 21 transfer procedures to either native muscles or free-functioning muscles to reconstruct elbow extension over a 9-year period. Outcome parameters included target muscle power grade and timing of recovery. A

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Gabaldón, Annette M., Frank E. Nelson, and Thomas J. Roberts. "Relative shortening velocity in locomotor muscles: turkey ankle extensors operate at low V/Vmax." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 294, no. 1 (2008): R200—R210. http://dx.doi.org/10.1152/ajpregu.00473.2007.

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The force-velocity properties of skeletal muscle have an important influence on locomotor performance. All skeletal muscles produce less force the faster they shorten and typically develop maximal power at velocities of ∼30% of maximum shortening velocity (Vmax). We used direct measurements of muscle mechanical function in two ankle extensor muscles of wild turkeys to test the hypothesis that during level running muscles operate at velocities that favor force rather than power. Sonomicrometer measurements of muscle length, tendon strain-gauge measurements of muscle force, and bipolar electromy

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Koizumi, Kohei, Kumiko Sasao, Yoshihiro Senju, and Toyohiro Hamaguchi. "Power-Assisted Scissors Reduce Adductor Pollicis Muscle Fatigue: A Comparative Study in Female College Students." Applied Sciences 14, no. 23 (2024): 11375. https://doi.org/10.3390/app142311375.

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Hand fatigue commonly occurs in repetitive tasks, such as cutting with scissors, leading to discomfort, reduced productivity, and musculoskeletal disorders. Recent advances in assistive technology have introduced power-assisted scissors to reduce the muscular load. Pinching and grasping mainly involve the adductor pollicis muscles of the hand. Measuring the electromyographic (EMG) activity of these muscles provides valuable insights into the muscular effort required for such tasks. Studies have indicated that power-assisted devices can effectively reduce muscle strain and fatigue. However, res

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Robertson, D. G. E., Jean-Marie J. Wilson, and Taunya A. St Pierre. "Lower Extremity Muscle Functions during Full Squats." Journal of Applied Biomechanics 24, no. 4 (2008): 333–39. http://dx.doi.org/10.1123/jab.24.4.333.

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The purpose of this research was to determine the functions of the gluteus maximus, biceps femoris, semitendinosus, rectus femoris, vastus lateralis, soleus, gastrocnemius, and tibialis anterior muscles about their associated joints during full (deep-knee) squats. Muscle function was determined from joint kinematics, inverse dynamics, electromyography, and muscle length changes. The subjects were six experienced, male weight lifters. Analyses revealed that the prime movers during ascent were the monoarticular gluteus maximus and vasti muscles (as exemplified by vastus lateralis) and to a lesse

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Josephson, R. K., J. G. Malamud, and D. R. Stokes. "Power output by an asynchronous flight muscle from a beetle." Journal of Experimental Biology 203, no. 17 (2000): 2667–89. http://dx.doi.org/10.1242/jeb.203.17.2667.

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The basalar muscle of the beetle Cotinus mutabilis is a large, fibrillar flight muscle composed of approximately 90 fibers. The paired basalars together make up approximately one-third of the mass of the power muscles of flight. Changes in twitch force with changing stimulus intensity indicated that a basalar muscle is innervated by at least five excitatory axons and at least one inhibitory axon. The muscle is an asynchronous muscle; during normal oscillatory operation there is not a 1:1 relationship between muscle action potentials and contractions. During tethered flight, the wing-stroke fre

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Nopin, Sergei, Yulia Koryagina, Gukas Ter-Akopov, and Sabina Abutalimova. "Dynamics of muscle electric activity parameters and maximum power characteristics in different phases of performance of weightlifting snatch." Russian Journal of Biomechanics 25, no. 4 (2021): 329–37. http://dx.doi.org/10.15593/rjbiomech/2021.4.04.

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Weightlifting exercises are coordinately complex, speed and power based movements, which simultaneously combine the maximum muscle work with different contraction types and limit the result with special functional features of the neuromuscular apparatus. According to modern views, indicators of biomechanics of the motor act and electromyographic characteristics of leading muscles during performance of the act show different aspects of the same process of contraction and can be used as criteria for an evaluation of muscle efforts and the functional state of the neuromuscular apparatus. The obje

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Aerts, P. "Vertical jumping in Galago senegalensis: the quest for an obligate mechanical power amplifier." Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences 353, no. 1375 (1998): 1607–20. http://dx.doi.org/10.1098/rstb.1998.0313.

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Bushbabies ( Galago senegalensis ) are renowned for their phenomenal jumping capacity. It was postulated that mechanical power amplification must be involved. Dynamic analysis of the vertical jumps performed by two bushbabies confirms the need for a power amplifier. Inverse dynamics coupled to a geometric musculo–skeletal model were used to elucidate the precise nature of the mechanism powering maximal vertical jumps. Most of the power required for jumping is delivered by the vastus muscle–tendon systems (knee extensor). Comparison with the external joint–powers revealed, however, an important

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Romadi, Tomoliyus, Alim Abdul, Budiarti Ratna, and Kustriyono Munajad Sigit. "Relationship between Arm Length, Power Arm Muscles and Power Lemb Muscles on Butterfly Style Swimming Achievement." INTERNATIONAL JOURNAL OF MULTIDISCIPLINARY RESEARCH AND ANALYSIS 07, no. 06 (2024): 2636–42. https://doi.org/10.5281/zenodo.12526362.

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This study aims to determine the relationship between arm length, arm muscle power and leg muscle power on butterfly swimming performance. This research uses a survey method. Data collection techniques use tests and measurements. The population in this study were swimming athletes aged 12 to 13 years in the Special Region of Yogyakarta Province. The research used was population research with a total of 27 athletes. The main instruments used are the arm length test, arm muscle power test, leg muscle power test and 25 meter butterfly swimming test. The data analysis used is the normality test, l

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Syme, Douglas A., and Robert E. Shadwick. "Effects of longitudinal body position and swimming speed on mechanical power of deep red muscle from skipjack tuna (Katsuwonus pelamis)." Journal of Experimental Biology 205, no. 2 (2002): 189–200. http://dx.doi.org/10.1242/jeb.205.2.189.

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SUMMARY The mechanical power output of deep, red muscle from skipjack tuna (Katsuwonus pelamis) was studied to investigate (i) whether this muscle generates maximum power during cruise swimming, (ii) how the differences in strain experienced by red muscle at different axial body locations affect its performance and (iii) how swimming speed affects muscle work and power output. Red muscle was isolated from approximately mid-way through the deep wedge that lies next to the backbone; anterior (0.44 fork lengths, ANT) and posterior (0.70 fork lengths, POST) samples were studied. Work and power wer

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Kusuma Abadi, Akbar, Hasna Trı Oktavıa, Khaırul Mada Setıadı, Gunarso Bagus Wicaksono, and Ines Hayunıngtyas. "COMPARISON OF ARM AND LEG MUSCLE FATIGUE DURING A 3X3 BASKETBALL GAME: A PRE- EXPERIMENTAL STUDY." Malaysian Journal of Sport Science and Recreation 21, no. 1 (2025): 1–8. https://doi.org/10.24191/mjssr.v21i1.5664.

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This study aims to analyze the differences in fatigue that occur in the explosive power of the arm and leg muscles after a 3x3 basketball game. Muscle fatigue is an important factor that affects player performance, especially in sports that rely on explosive muscle strength, such as basketball. This study uses a pre-experimental design with a quantitative approach, involving 12 participants as the sample. The data obtained from the measurement of arm and leg muscle explosive power were analyzed using the Shapiro-Wilk test to examine data distribution normality, Levene's test for homogeneity, a

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Bobbert, Maarten F., L. J. Richard Casius, Stephan van der Zwaard, and Richard T. Jaspers. "Effect of vasti morphology on peak sprint cycling power of a human musculoskeletal simulation model." Journal of Applied Physiology 128, no. 2 (2020): 445–55. http://dx.doi.org/10.1152/japplphysiol.00674.2018.

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Fascicle length of m. vastus lateralis in cyclists has been shown to correlate positively with peak sprint cycling power normalized for lean body mass. We investigated whether vasti morphology affects sprint cycling power via force-length and force-velocity relationships. We simulated isokinetic sprint cycling at pedaling rates ranging from 40 to 150 rpm with a forward dynamic model of the human musculoskeletal system actuated by eight leg muscles. Input of the model was muscle stimulation over time, which was optimized to maximize the average power output over a pedal cycle. This was done for

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Rival, Arivaldy, Doni Doni, Argantos Argantos, Yogi Setiawan, and Yendrizal Yendrizal. "The Contribution of Arm Muscle Strength and Limb Muscle Explosive Power to the 50 Meter Butterfly Swim." Jurnal Gladiator 3, no. 1 (2023): 1–15. https://doi.org/10.24036/gltdor91011.

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The purpose of writing this article is to determine the contribution of arm muscle strength and leg muscle explosive power to the 50 meter butterfly stroke swimming ability of Specialized Swimming Students, FIK UNP Training Department. This type of research is correlational research. This research was conducted in May 2021 at the FIK UNP Padang swimming pool. In writing this article a sample of 20 students. The instrument in this study used 1) medical ball throwing, 2) standing broad jump test and 3) the 50 meter butterfly swimming test. The analysis technique used simple correlation analysis

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Radermecker, M. A., F. Chaussende, C. Struble, et al. "Biomechanical Characteristics of Unconditioned and Conditioned Latissimus Dorsi Muscles Used for Cardiocirculatory Assistance." Cardiovascular Surgery 5, no. 5 (1997): 516–25. http://dx.doi.org/10.1177/096721099700500516.

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An understanding of the biomechanical characteristics of striated skeletal muscles involved in cardiocirculatory assistance is a prerequisite to assess their efficacy and to evaluate their haemodynamic benefits. Six goats had their latissimus dorsi muscles evaluated by isometric strain gauge testing. Total tension, and both active and passive force development at different preloads were measured. The relationship between muscle impedance and starting length was also studied. Four additional muscles were submitted to isometric and isotonic strain gauge testing after 3 months of chronic electric

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Roberts, Thomas J. "Some Challenges of Playing with Power: Does Complex Energy Flow Constrain Neuromuscular Performance?" Integrative and Comparative Biology 59, no. 6 (2019): 1619–28. http://dx.doi.org/10.1093/icb/icz108.

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Abstract Many studies of the flow of energy between the body, muscles, and elastic elements highlight advantages of the storage and recovery of elastic energy. The spring-like action of structures associated with muscles allows for movements that are less costly, more powerful and safer than would be possible with contractile elements alone. But these actions also present challenges that might not be present if the pattern of energy flow were simpler, for example, if power were always applied directly from muscle to motions of the body. Muscle is under the direct control of the nervous system,

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Trappe, S., P. Gallagher, M. Harber, J. Carrithers, W. Evans, and T. Trappe. "MUSCLE POWER WITH AGING." Medicine & Science in Sports & Exercise 34, no. 5 (2002): S98. http://dx.doi.org/10.1097/00005768-200205001-00544.

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