Morphological analysis of force/velocity relationship in dynamic exercise at varying loads

Journal of Strength and Conditioning Research
Eloisa Limonta, Massimiliano Sacchi

Abstract

This study examined the force/velocity (F/V) curve morphology among the entire concentric phase of the countermovement squat (CMS). The hypothesis is that F/V curve shape of the lower limb muscles complex is different from F/V isolated muscle curve and that these analyses could be useful in characterizing athletes' muscular capacity and training programs. Squat exercise was performed by 29 subjects (15 men and 14 women, divided into resistance and endurance athletes). The protocol was 6 x 1 CMS at maximal speed with increasing loads: 20, 35, 50, 65, 80, 90% of 1 repetition maximum (1RM). Displacement, speed, and acceleration of the weight bar, joint knee angles, knee angular speed, and total and normalized forces were collected. F/V relation was obtained by force and velocity values of each 10 degrees angular interval of the concentric phase for any load. Results show that the F/V relationship does not follow a linear shape and an equivalent criterion for all loads. We observed a "second peak force" statistically higher (p < 0.05) than the inversion peak at 80 and 90% 1RM. Resistance trained men showed a "second peak" higher and larger than that shown by endurance trained men. This indicated a higher ability to produce and main...Continue Reading

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Citations

May 14, 2014·European Journal of Applied Physiology·Ivan CukSlobodan Jaric
Aug 5, 2015·Journal of Human Kinetics·Antonio J Morales-ArtachoBelén Feriche
May 5, 2017·Journal of Human Kinetics·Milena Z ZivkovicSlobodan Jaric
Jul 28, 2013·Journal of Applied Physiology·Hugo HauraixSylvain Dorel
May 26, 2017·Journal of Strength and Conditioning Research·Fernando Naclerio, Eneko Larumbe-Zabala

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