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Title

The effects of negative work on the maximal instantaneous muscular power of humans during vertical jumps

Authors
Atchou, Guillaume
Azabji, Marcel
Published in Sport Sciences for Health. 2015, vol. 11, no. 3, p. 243-249
Abstract The aim of this study was to test the hypothesis that the maximal instantaneous muscular power of humans (w_ p) is affected by the negative work performed immediately before the jump (wn), possibly due to the recoil of elastic strain energy stored in previously stretched series-elastic elements of the muscle–tendon complex. Twenty-seven Bantu subjects (age 25.1 ± 4.3 years, body mass 67.5 ± 7.8 kg) were investigated. The w_ p, the average power (w_ a) and wn were determined during maximal vertical jumps off both feet on a force platform. Three jumping conditions were studied: squat jumps (SQ), countermovement jumps (CM), and jumps preceded by a free fall (FF) from a height of 0.3 m above the platform surface. The wn was higher in CM than in SQ and in FF than in CM and SQ. The w_ p was 3.51 ± 0.54 kW in SQ and did not vary in CM and FF. The w_ a increased with increasing wn (1.70 ± 0.30; 1.85 ± 0.34; 1.99 ± 0.31 kW in SQ, CM and FF, respectively, p
Keywords JumpingElastic energyMechanical power
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Article (Published version) (623 Kb) - document accessible for UNIGE members only Limited access to UNIGE
Other version: http://link.springer.com/10.1007/s11332-015-0229-x
Structures
Research group Métabolisme énergétique (642)
Project Cooperation grant, University of Geneva School of Medicine and the Yaounde´ Medical School, Cameroon
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ATCHOU, Guillaume et al. The effects of negative work on the maximal instantaneous muscular power of humans during vertical jumps. In: Sport Sciences for Health, 2015, vol. 11, n° 3, p. 243-249. https://archive-ouverte.unige.ch/unige:98778

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Deposited on : 2017-11-08

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