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QUANTIFYING THE EFFECT OF PLYOMETRIC HOPPING EXERCISES ON THE MUSCULOSKELETAL SYSTEM: CONTRIBUTIONS OF THE LOWER LIMB JOINT MOMENTS OF FORCE TO GROUND REACTION FORCES IN HOPPING EXERCISE

Faculdade de Motricidade Humana (Faculty of Human Kinetics), Universidade Téchnica de Lisboa (Technical University of Lisboa), CIPER, LBMF, Lisbon, Estrada da Costa, 1499-002 Cruz-Quebrada, Portugal

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ANTÓNIO VELOSO

Faculdade de Motricidade Humana (Faculty of Human Kinetics), Universidade Téchnica de Lisboa (Technical University of Lisboa), CIPER, LBMF, Lisbon, Estrada da Costa, 1499-002 Cruz-Quebrada, Portugal

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https://doi.org/10.1142/S0219519413500279Cited by:1 (Source: Crossref)

Abstract

The purpose of this study was to estimate the ability of joint moments of force in transferring mechanical energy through all the leg segments during a cyclic hopping sequence, performed until exhaustion. The technique was applied to data from four healthy active students to characterize the relative contribution of the lower limb net joint moments of force to accelerate the ankle, knee, and hip joints. Our findings showed that the strategies used to maintain the same jumping height rely on the balance between the net joint moments to guarantee the acceleration of the joints. It seems that while the ankle and knee moments reduce their contribution to accelerate the ankle and the knee joints, the hip moments increase their participation and have an important influence in the re-arrangement of the musculoskeletal system to maintain the same mechanical output.

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