ORIGINAL PAPER
Take-off efficiency: transformation of mechanical work into kinetic energy during the Bosco test
1
Technical University of Liberec, Liberec, the Czech Republic
2
University of Hradec Králové, Hradec Králové, the Czech Republic
3
Massey University, Palmerston North, New Zealand
Online publication date: 2018-02-26
Hum Mov. 2017;18(3):34-39
KEYWORDS
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.
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.
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| eISSN: | 1899-1955 |
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