TAKE-OFF EFFICIENCY: TRANSFORMATION OF MECHANICAL WORK INTO KINETIC ENERGY DURING THE BOSCO TEST
Journal Title: Human Movement - Year 2017, Vol 18, Issue 3
Abstract
Purpose. The aim of the study is to present a new method for determining the efficiency of take-off during a 60-s Bosco repeated vertical jump test. Methods. The study involved 15 physical education students (age: 21.5 ± 2.4 years; height: 1.81 ± 0.08 m; mass: 76 ± 9 kg). The data were collected with the use of a pedobarographical system (Pedar-x; Novel, Munich, Germany). The statistical analysis utilized a simple linear regression model. Results. Owing to possible fatigue, flight time and flight height decreased. The average flight height was 0.260 ± 0.063 m, and the average contact time equalled 0.54 ± 0.16 s. The average anaerobic power values calculated for the 60-s work period had the mean value of 21.9 ± 6.7 W · kgBW–1; there was a statistically significant (p < 0.05) decrease in anaerobic power during the 60-s Bosco test. Conclusions. The efficiency of mechanical work was highest at the beginning of the test, reaching values of up to 50%. The efficiency of mechanical work conversion into mechanical energy seems to be an appropriate determinant of rising fatigue during the 60-s Bosco jumping test. Key words: velocity, contact time, vertical force, counter-movement jump, flight time
Authors and Affiliations
SONA JANDOVA, MICHAL MUSILEK, ANDREW J. MARTIN, DARRYL COCHRANE, JIRI ROZKOVEC
Keywords
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- EP ID EP275954
- DOI 10.1515/humo-2017-0023
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