Relevant bibliographies by topics / Downhill bike

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  2. Dissertations / Theses
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  4. Conference papers

Academic literature on the topic 'Downhill bike'

Author: Grafiati
Published: 4 June 2021
Last updated: 9 February 2022

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Journal articles on the topic "Downhill bike"

1

Rhyan, Steve. "Training Suggestions for the Downhill Mountain Bike Racer." Strength and Conditioning Journal 27, no. 5 (October 2005): 42–45. http://dx.doi.org/10.1519/00126548-200510000-00006.

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Kirkwood, Lewis Adam, Lesley A. Ingram, Jamie Cunningham, Eva Malone, and Geraint D. Florida-James. "Physiological characteristics and performance in elite enduro mountain biking." Journal of Science and Cycling 6, no. 2 (December 31, 2017): 13–21. http://dx.doi.org/10.28985/171231.jsc.09.

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Enduro mountain bike racing is composed of several timed predominantly downhill race stages linked by time restricted, non-competitive transition stages. This study aimed to 1) detail and compare the laboratory assessed physiological characteristics of elite and non-elite enduro mountain bike riders, and 2) evaluate the use of 10Hz global positioning systems (GPS) unit including a 100Hz triaxial accelerometer to define the demands of enduro mountain bike racing and identify components of successful performance. Eleven (n=11) male enduro mountain bike riders completed laboratory protocols for peak aerobic capacity (VO2peak), onset of blood lactate accumulation at 2 and 4 mmol/L (OBLA2 and OBLA4 respectively), intermittent sprint test (EST), and anthropometry measures. Participants were divided into elite (n=5) and non-elite (n=6) groups for analysis. Nine (n=9) elite enduro mountain bike athletes participated in field data collection at an international enduro mountain bike race. Two race stages were used for analysis of velocity, accumulated load, heart rate and time to complete specific sections of track calculated from GPS units placed on the bicycle seat mast and the rider’s torso. Elite athletes produced greater power during the EST and at VO2peak, OBLA2, OBLA4 when compared to non-elite riders (all p<0.05) with no significant differences in anthropometry (p>0.05). Accumulated load was significantly greater on the bicycle than the rider on both stages (p<0.05) and accumulated load in both locations was significantly higher during stage two compared to stage 1 reflecting differences in terrain (p<0.05). GPS analysis allowed detailed analysis of performance showing winning performances were characterised by reduced time to complete technical downhill and non-technical climbing sections during stage one and technical downhill sections only during stage two. In conclusion, successful performance in enduro mountain bike racing requires adequate skill and technique to sustain high velocities over technical terrain coupled with large aerobic and anaerobic capacities.
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Sperlich, Billy, Silvia Achtzehn, Mirijam Buhr, Christoph Zinner, Stefan Zelle, and Hans-Christer Holmberg. "Salivary Cortisol, Heart Rate, and Blood Lactate Responses During Elite Downhill Mountain Bike Racing." International Journal of Sports Physiology and Performance 7, no. 1 (March 2012): 47–52. http://dx.doi.org/10.1123/ijspp.7.1.47.

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Purpose:This study aimed to quantify the intensity profile of elite downhill mountain bike races during competitions.Methods:Seventeen male downhill racers (22 ± 5 y; 185.1 ± 5.3 cm; 68.0 ± 3.9 kg; VO2peak: 59.4 ± 4.1 mL·min·kg−1) participated in the International German Downhill Championships in 2010. The racers’ peak oxygen uptake and heart rate (HR) at 2 and 4 mmol·L−1 blood lactate (HR2 and HR4), were assessed during an incremental laboratory step test (100 W, increase 40 W every 5 min). During the races, the HR was recorded and pre- and postrace blood lactate concentrations as well as salivary cortisol levels were obtained.Results:During the race, the absolute time spent in the “easy” intensity zone was 23.3 ± 6.8 s, 24.2 ± 12.8 s (HR2–HR4) in the “moderate” zone, and 151.6 ± 18.3 s (>HR4) in the “hard” zone. Eighty percent of the entire race was accomplished at intensities >90% HRpeak. Blood lactate concentrations postrace were higher than those obtained after the qualification heat (8.0 ± 2.5 mmol·L−1 vs 6.7 ± 1.8 mmol·L−1, P < .01). Salivary levels of cortisol before the competition and the qualification heat were twice as high as at resting state (P < .01).Conclusions:This study shows that mountain bike downhill races are conducted at high heart rates and levels of blood lactate as well as increased concentration of salivary cortisol as marker for psycho-physiological stress.
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Sakai, Daiki, Naosuke Uchida, Shinnosuke Enomoto, Souya Iwata, Yasuo Kawakami, and Shigeru Wesugi. "Improving Road Bike Leaning Skills on Downhill Corners (Developing a System for Detecting Curvature Change Points and the Angle of a Road Bike while Riding)." Proceedings 49, no. 1 (June 15, 2020): 153. http://dx.doi.org/10.3390/proceedings2020049153.

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In road bicycle races, advanced skills are needed to traverse downhill corners quickly and safely. A previous study revealed that in specific experimental corners, some beginners tend to lean their bikes more compared to experts. Therefore, in seeking to develop a support method for improving rider skill in controlling bike position, the authors aimed to design a system that indicates to users the positions of their bikes to lean it at the appropriate inclination when making turns. First, we determined the corner starting points using the RTK (Real Time Kinematic) positioning system. Then, we calculated the theoretical inclination and compared this to the inclination practiced by an expert. The experiment with this system showed that the expert started leaning the bike approximately 5 m short of a corner’s starting point with the speed maintained at approximately 25 km/h, with some correlation found between the theoretically ideal degree of inclination and the expert’s actual inclination.
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Cahyadi, Hery Sigit, Herlan Suherlan, and Muhammad Aldo Dewantara. "Cost and Benefit Analysis of Sports Tourism in Downhill Trek, Cikole Lembang, Bandung Barat District, West Java Province." Jurnal Kepariwisataan: Destinasi, Hospitalitas dan Perjalanan 5, no. 1 (June 10, 2021): 1–9. http://dx.doi.org/10.34013/jk.v5i1.293.

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The purpose of the research is to analyze the cost and benefit analysis and find out the feasibility of sport tourism development at Cikole, Lembang in support the lacal community income. This research was conducted at the Downhill Track Cikole Bike Park in Lembang District and is a tourist attraction in the form of downhill bicycle track facilities. The number obtained is the result of calculating the comparison between benefits and costs and shows the value that can be defined as a feasible activity, because the numbers obtained have a value of more than 1 which is an indication of eligibility with a results in the form of> 1 declared feasible and if <1 (less of) is declared ineligible. Based on the calculation results of the Cost-Benefit Ratio (CBR) analysis with the final result in the form of a comparison value of 3,3128528. With the increase in the number of visits and opening of new jobs, the results of the analysis in the form of downhill activities have been declared feasible.
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Johnson, Evan C., J. Luke Pryor, Douglas J. Casa, Luke N. Belval, James S. Vance, Julie K. DeMartini, Carl M. Maresh, and Lawrence E. Armstrong. "Bike and run pacing on downhill segments predict Ironman triathlon relative success." Journal of Science and Medicine in Sport 18, no. 1 (January 2015): 82–87. http://dx.doi.org/10.1016/j.jsams.2013.12.001.

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Schmitt, Thilo, Florian Pfalzer, Jochen Huth, and Frieder Mauch. "Traumatic medial clavicle fracture induced by chin bar of a full-face helmet following a downhill mountainbike accident." Sportverletzung · Sportschaden 34, no. 01 (February 18, 2020): 48–50. http://dx.doi.org/10.1055/a-1057-1096.

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AbstractDownhill mountain biking is a rapidly growing sport. In our case we want to present an isolated medial clavicular fracture following a mountain bike accident with a critical review on the used protection device. A 35 year old healthy patient presented to our hospital after bike accident during downhill mountain biking in Austria with pain over his right medial clavicle. The imaging showed a multifragmentary medial clavicle fracture with an intact SC-joint. Surgical intervention was recommended. Postoperative x-rays showed an anatomic reposition and correct plate positioning. The implant was removed after 18 months without any complications. A full-face helmet with a chin bar is used to achieve better protection of the maxilla, mandible and the teeth. In a hyperflexion situation of the cervical spine, a direct contact of the chin bar with the sternum, sc-joint and the medial clavicle can occur. This impact sets the mentioned structures on a high risk of dislocation and fracture as seen in our case. This risk can be significantly reduced by the combined use of a full face helmet and a neck brace. If the injury is properly identified, positive results can be achieved by surgery.
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Collotta, Massimo, Luigi Solazzi, Stefano Pandini, and Giuseppe Tomasoni. "New design concept of a downhill mountain bike frame made of a natural composite material." Proceedings of the Institution of Mechanical Engineers, Part P: Journal of Sports Engineering and Technology 232, no. 1 (June 13, 2017): 50–56. http://dx.doi.org/10.1177/1754337117712422.

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Melau, Jørgen, Martin Bonnevie-Svendsen, Maria Mathiassen, Janne Mykland Hilde, Lars Oma, and Jonny Hisdal. "Late-Presenting Swimming-Induced Pulmonary Edema: A Case Report Series from the Norseman Xtreme Triathlon." Sports 7, no. 6 (June 3, 2019): 137. http://dx.doi.org/10.3390/sports7060137.

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Swimming-induced pulmonary edema (SIPE) may develop during strenuous physical exertion in water. This case series reports on three cases of suspected late-presenting SIPE during the Norseman Xtreme Triathlon. A 30-year-old male professional (PRO) triathlete, a 40-year-old female AGE GROUP triathlete and a 34-year-old male AGE GROUP triathlete presented with shortness of breath, chest tightness and coughing up pink sputum during the last part of the bike phase. All three athletes reported an improvement in breathing during the first major uphill of the bike phase and increasing symptoms during the downhill. The PRO athlete had a thoracic computed tomography, and the scan showed bilateral ground glass opacity in the peripheral lungs. The male AGE GROUP athlete had a normal chest x-ray. Both athletes were admitted for further observation and discharged from hospital the following day, with complete regression of symptoms. The female athlete recovered quickly following pre-hospital oxygen treatment. Non-cardiogenic pulmonary edema associated with endurance sports is rare but potentially very dangerous. Knowledge and awareness of possible risk factors and symptoms are essential, and the results presented in this report emphasize the importance of being aware of the possible delayed development of symptoms. To determine the presence of pulmonary edema elicited by strenuous exercise, equipment for measuring oxygen saturation should be available for the medical staff on site.
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Mestre, Daniel R., Virginie Dagonneau, and Charles-Symphorien Mercier. "Does Virtual Reality Enhance Exercise Performance, Enjoyment, and Dissociation? An Exploratory Study on a Stationary Bike Apparatus." Presence: Teleoperators and Virtual Environments 20, no. 1 (February 1, 2011): 1–14. http://dx.doi.org/10.1162/pres_a_00031.

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The present study aimed at testing the general assumption that virtual reality can enhance the experience of exercising. More specifically, we tested the effects of sensory input (music and video feedback) during physical training on performance, enjoyment, and attentional focus by means of a computerized ergometer coupled with VR software. Twelve university students participated in the study. The experimental procedure consisted in a 2 × 3 × 4 mixed design, with two types of feedback (video feedback vs. video feedback and music), three course phases (e.g., flat, uphill, and downhill) and four sessions (task repetition). The virtual feedback was a video film of the course that participants had to complete. Video display speed was proportional to the participant's pedaling speed. Force feedback, applied to the real bicycle wheel, was proportional to the instantaneous course slope. The results showed a positive effect of task repetition on participants' performance only when video feedback was associated with listening to music. In an attempt to objectively assess attentional focus, we analyzed participants' gaze orientation. Gaze analysis showed a reduction in the time spent gazing at video feedback across sessions. Associating video feedback with freely chosen music led to a differential use of video feedback as a function of exercise intensity. Finally, sensory stimulation appeared to have a dissociative role on participants' attentional focus during exercise, but adding music listening to video feedback appears to be necessary to maintain (long term) the participants' commitment to the task. The results are discussed in terms of the functional status of sensory stimulation during exercise, and its interactions with exercise intensity, participants' performance, and attentional focus. They also suggest that gaze analysis is one promising way to access attention allocation and its relationships with performance.
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Dissertations / Theses on the topic "Downhill bike"

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Jelínek, Martin. "Návrh rámu horského kola a jeho deformačně napěťová analýza pomocí MKP." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-228304.

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The aim of this diploma thesis is the part of evolution of the new bicycle frame for mountain biking, category enduro. The first part of this thesis is focused on creating dimensional modified model of the bike frame in CAD system SolidWorks. Subsequently this frame will be detailed by FEM analysis in software ANSYS Workbench and determine boundary conditions for this analysis. The final part is about visualization of the new bike frame.
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Lopušek, Dávid. "Sportovní vozidlo pro handicapované osoby." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231446.

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The master thesis deals with the engineering design and realization of a sports electric vehicle for disabled people. The first part of thesis summarize competitive vehicles on market and also the necessary theoretical knowledge for the design phase. After analyzing the research and determine the resulting vehicle concept follows the draft design. In this section based on calculations was chosen the solutions and necessary components for a vehicle. The following section describes the structure of the vehicle in implementing selected components. In conclusion, the evaluation of the proposed solution.
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Mühlhans, Petr. "Podnikatelský záměr v oblasti cyklistiky pro všechny." Master's thesis, Vysoká škola ekonomická v Praze, 2012. http://www.nusl.cz/ntk/nusl-127025.

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Picturing an interesting combination of extreme sport and spa services in purpose of supporting travel trade in Czech city of Marianske Lazne. Taking advantage of unique layout of Czech's youngest significant spa town and its easy accessibility of diverse services on a relatively small area. Researching problems of public goods and active participation in developing potencial of local ski resort.
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Books on the topic "Downhill bike"

1

Hardcastle, Michael. Downhill Biker (Mega Stars). Hodder Wayland, 2001.

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Downhill Biker (Mega Stars). Hodder Wayland, 2001.

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Publishers, Downhill24. Journal for Downhill Mountain Bike Mtb Skull: Dot Dotted Grid Funny Notebook Diary Journal Bicycle Bmx Freestyle Single Speed Lover School Gift for Men & Women Extreme Sports Enduro Unicycle Racing Forrest Bicyclette Cycling. Independently Published, 2019.

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Publishers, Downhill24. Journal for Downhill Mountain Bike Mtb Parts: Dot Dotted Grid Funny Notebook Diary Journal Bicycle Bmx Freestyle Single Speed Lover School Gift for Men & Women Extreme Sports Enduro Unicycle Racing Forrest Bicyclette Cycling. Independently Published, 2019.

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Publishers, Downhill24. Journal for Downhill Mountain Bike Mtb Gear: Dot Dotted Grid Funny Notebook Diary Journal Bicycle Bmx Freestyle Single Speed Lover School Gift for Men & Women Extreme Sports Enduro Unicycle Racing Forrest Bicyclette Cycling. Independently Published, 2019.

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Publishers, Downhill24. Journal for Downhill Mountain Bike Mtb Break Bones: Dot Dotted Grid Funny Notebook Diary Journal Bicycle Bmx Freestyle Single Speed Lover School Gift for Men & Women Extreme Sports Enduro Unicycle Racing Forrest Bicyclette Cycling. Independently Published, 2019.

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Publishers, Downhill24. Journal for Downhill Mountain Bike Mtb Parts Gold: Dot Dotted Grid Funny Notebook Diary Journal Bicycle Bmx Freestyle Single Speed Lover School Gift for Men & Women Extreme Sports Enduro Unicycle Racing Forrest Bicyclette Cycling. Independently Published, 2019.

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Publishers, Downhill24. Journal for Downhill Mountain Bike Mtb Break Bones Gold: Dot Dotted Grid Funny Notebook Diary Journal Bicycle Bmx Freestyle Single Speed Lover School Gift for Men & Women Extreme Sports Enduro Racing Forrest Bicyclette Cycling. Independently Published, 2019.

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Publishing, Down the Hill. Mountain Bike Adventure Planner: A Handy Sized 6x9 MTB Mileage Journal to Write in to Record Mountain Bike Trips, Rides and Vacations. Perfect Gift for Downhil MTB Lover and Mountain Biker Sports Lover. Independently Published, 2020.

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Publishing, Down the Hill. Mountain Bike Log Book: A Handy Sized 6x9 MTB Mileage Journal to Write in to Record Mountain Bike Trips, Rides and Vacations. Perfect Gift for Downhil MTB Lover and Mountain Biker Sports Lover. Independently Published, 2020.

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Conference papers on the topic "Downhill bike"

1

Kersulić, Ana, and Marko Perić. "VALUE NETWORK AS A KEY CATEGORY WITHIN EVENT SPORT TOURISM BUSINESS MODEL: THE CASE OF MERCEDES-BENZ UCI MOUNTAIN BIKE DOWNHILL LOŠINJ WORLD CUP 2018." In Tourism in Southern and Eastern Europe: Creating Innovative Tourism Experiences: The Way to Extend the Tourist Season. University of Rijeka, Faculty of Tourism and Hospitality Management, 2019. http://dx.doi.org/10.20867/tosee.05.49.

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Hadi Keong, Azwan, Jesus Campos, Andrei Casali, Anders Hansen, Sindre Vingen, Jordi Segura, Mark Hofacker, Ted Brueren, and Inge Fossdal. "Hybrid Electro-Optical Cable Continuously Powers Downhole Coiled Tubing Telemetry and Enables Time and Carbon Footprint Reductions During Extensive Cleanout Interventions." In SPE/ICoTA Well Intervention Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/204435-ms.

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Abstract On the Norwegian continental shelf (NCS), coiled tubing (CT) cleanout requires small bites and frequent wiper trips to the surface due to potential sand bedding in a large and deviated completion. A real-time CT downhole measurement system is used to optimize the operation, following a dynamic workflow. Conventionally, the system is powered by downhole lithium battery, which limits CT downhole operating time. A continuous surface-powered system was needed to promote further optimization for such operation. A new hybrid electro-optical cable was introduced to enable continuous power supply from surface to the real-time downhole tool sensors. The system consists of a surface power module that sends power through a layer of low-DC-resistance conductors and optical fibers that enable data telemetry. Conventionally, only three to four trips can be completed before replacement of the downhole battery is required. Battery replacement can take up to 8 hours due to the complexity of that offshore environment. With the continuous power supply, the CT cleanout operation can continue for days without interruption of data from the downhole tool sensors. A three-well CT cleanout campaign in the NCS demonstrated the benefits of this new real-time downhole measurement system by using accurate downhole weight and torque readings to control the penetration through scale and avoid motor stalls. Sections of scale bridges were identified during the cleanout by monitoring fluctuations of downhole torque of the mill. The monitoring allows CT operators to control penetration rate and bite length during the cleanout. When the milled debris are swept, downhole weight is used to detect early signs of solids plugging around the mill. Downhole pressures complement surveillance of the sweeping of solids to the surface by giving a qualitative measurement of solids loading through conversion of the real-time bottomhole pressure reading into equivalent circulating density with changing CT depth. The process of optimizing bite length and sweeping speed is repeated without interruption thanks to continuous power supply from the surface, eventually leading to time reduction. In one of the wells, downhole tools uninterruptedly acquired data for 10 days straight. The CT managed to clean out a total of 40 908 kg of a mixture of scale and sand, with an estimated average time reduction of 25% when compared to CT cleanout without real-time downhole data. Delivery of continuous high-voltage power to downhole tools not only enables reduction in operating time, it also paves the way for extending the capabilities of CT interventions by enabling the operation of more electrically activated application tools. It allows combining multiple work scopes in a single CT run, which reduces operating cost and provides greater operational flexibility. Finally, eliminating the dependency on lithium batteries reduces the carbon footprint for a more sustainable operation.
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