Academic literature on the topic 'Hand. Grip strength'

The purpose of this study was to determine the correlation among three hand strength measurement methods: Hand dynamometer, MDD (Middle Digital Extension Isokinetic Dynamometer), and Cybex. Five students (2 males, 3 females) from Ball State University were asked to participate in this study. Both right and left lower arm data were collected from these subjects. A Cybex 340 (Lumax Cor.) was employed to determine wrist flexion and extension isokinetic peak torque, total work, and power at 30 degrees/second and 60 degrees/second. A MDD was used to determine third digit eccentric torque, work, and power. A hand dynamometer (Lafayette Instrument Co., Model 76618) was used to determine grip force. Pearson product moment correlation coefficients were used to determine correlation among these variables. Significant correlations were noted between isometric grip strength and isokinetic 30 and 60 degrees/second wrist flexion power, as well as between isometric grip strength and isokinetic 30 degrees/second wrist extensor power. The results of this study indicate there is very little relationship between the three clinically used measurement tools.<br>School of Physical Education

The purpose of this study was to explore utility of handgrip strength measured by the hand-grip dynamometer for assessment of nutritional status in protein-calorie malnutrition. The first study included six subjects (all right-handed), who had grip strength measured daily for five days, then weekly for three weeks. Intra-individual variability was approximately 10%. No learning or training effect was observed. Change in leg position from feet on the floor to elevation of feet made no significant difference in grip-strength measurement. In Phase Two, 43 healthy adult subjects (three left-handed) prior to elective surgery, height was significantly related to handgrip strength (r = 0.82, p < 0.001). Males were stronger than females. After surgery, the non-dominant hand lost significant strength (2.68 kilograms) and recovered more quickly than the dominant hand. Multiple regression analyses provided predictive equations for pre-surgery left hand-grip strength using age, sex, and height (R² = 0.77); from age, sex, hand measured, and grip strength two days after surgery or three days after surgery (R² = 0.89 for each). Ten sequential grip-strength measurements analyzed by repeated measures analysis of variance with orthogonal comparisons showed a difference in measurements between hands as well as before and after surgery. The slope of the measurement line was more linear before and three days after surgery, but more quadratic in shape two days after surgery. The effects seen by type of surgery were inversion of the slope of right hand sequential measurements two days after knee surgery and before-surgery drop and increase from trial five to trial seven in left hand sequential measurements of knee and vaginal hysterectomy subjects. In a six-month-long case study, grip-strength measurements were followed in a seriously-ill 68-year-old patient hospitalized for surgical repair of hiatal hernia and mucous fistula who underwent several periods of nutritional depletion. Grip strength varied throughout the period (although not differently from healthy subjects), but did not directly parallel changes in serum albumin or prealbumin. The conclusion was that hand strength measured by the handgrip dynamometer did not change enough with fasting and surgery from normal day-to-day variability to be useful for nutritional assessment.

Bakgrund: Bålstabilitet är nödvändigt för att hålla balansen och möjliggör kraftöverföring genom kroppen. Detta gör bålstabilitet viktigt i vardagliga sysslor, sportutföranden och för att minska risken för skada. En bättre förståelse över bålstabiliteten i olika sporter kan utveckla träningsprogram, inte bara för att förbättra bålstabiliteten, utan även för att förbättra den generella prestationen. Syfte: Syftet med denna studie var att undersöka skillnader i båluthållighet mellan unga kvinnliga ryttare och fotbollsspelare, och associationen med handgrepp styrka och rotationsrörlighet i ryggen. Metod:  Båluthålligheten undersöktes med McGill’s båluthållighets test, mellan kvinnliga ryttare (n = 10) och fotbollsspelare (n = 10), ålder 16 – 20. Handgreppsstyrkan undersöktes med en handdynamometer och användes som en indikation av generell styrka. Ryggrotations testet undersöktes men en Myrinmätare. Shapiro-Wilks användes för att bekräfta normalfördelning av data. Oberoende t-test användes för att jämföra båluthållighet (sek.) mellan ryttarna och fotbollsspelarna. Signifikansnivån fastställdes till &lt;0,05. Ett styrkeförhållande räknades ut (kg/kg kroppsvikt) och Pearsons korrelationskoefficient användes sedan för att undersöka associationen med båluthållighet (sek.). Pearsons korrelationskoefficient användes också för att undersöka associationen mellan medelvärdet av ryggrotation (°) och båluthållighet (sek.). Hög korrelation fastställdes när r&gt; (0,7), måttlig korrelation när r = (0,3 – 0,7) och låg korrelation när r &lt;0,3.  Resultat: Resultaten visade att ryttarna hade bättre uthållighet i bålextensionen, jämfört med fotbollsspelarna (p = 0,006). Lateralflexionen av bålen visade ingen skillnad mellan ryttarna och fotbollsspelarna (p = 0,924; p = 0,423). Handgrepp styrkan visade måttlig korrelation med bålextensionen (r = 0,631; r² = 0,398) och båda sidor av lateralflexionen av bålen (r = 0,411; r² = 0,169; r = 0,615; r² = 0,378). Rotationsrörligheten i ryggen visade låg korrelation med samtliga båluthållighets tester (r &gt;0,3). Slutsats: Resultaten indikerar få skillnader mellan ryttare och fotbollsspelare, vilket inte är tillräckligt för att fastställa någon slutsats. Korrelationen mellan handgreppsstyrkan och båluthållighet indikerar att bättre bålstabilitet associerar med mer generell styrka.<br>Background: Core stability is necessary to keep balance and enables force to be transmitted through the body. This makes core stability important in everyday chores, sport performance and to reduce risk of injuries. A better understanding of the core stability in different sports can develop athletes training programs, not only to improve the core stability itself, but also to improve overall performance. Aim: The aim of this study was to examine the differences in core endurance between young female horseback riders and soccer players, and the core endurance association with hand grip strength and spinal rotation mobility. Methods: The McGill’s core endurance test was used to examine the core endurance between female horseback riders (n = 10) and soccer players (n = 10), age 16-20. The hand grip strength was examined with a hand grip dynamometer and was used to get an indication of overall body strength. The spinal rotation mobility was examined with a Myrin goniometer. Shapiro-Wilks was used to confirm the normality of the data. Independent sample t-test was used to compare core endurance time (sec.) between the horseback riders and the soccer players. The significant level was set at &lt; 0.05. A strength ratio was calculated (kg/kg body weight), and the Pearson’s correlation coefficient was used for examining the association to core endurance (sec.). Pearson’s correlation coefficient was also used to examine the association between the spinal rotation mobility (°) and core endurance (sec.). High correlations were set at r &gt; (0.7), moderate when r = (0.3- 0.7) and low when r &lt; (0.3). Results: The result showed that horseback riders had better endurance in the trunk extensor test than the soccer players (p = 0.006). Hand grip strength showed moderate correlation with the endurance time of the trunk extensor test (r = 0.631, r² = 0.398), and with the lateral flexor tests (r = 0.411, r² = 0.169; r = 0.615, r² = 0.378). Low correlation was shown with the trunk flexor test (r = 0.197, r² = 0.039). The spinal rotation mobility test showed low correlation with all the core endurance tests (r &gt;0.3). Conclusion: The results indicates few differences between the horseback riders and the soccer players, which is not enough to draw a conclusion. The correlation between hand grip strength and the core endurance tests indicates that a better core stability might be associated to an increased overall body strength.