The effect of short-term resistance training on hip and knee kinematics during vertical drop jumps

Journal of Strength and Conditioning Research
Kevin W McCurdyJonathan Woods

Abstract

The purpose of this study was to determine the effect of a weight-bearing free weight resistance training program alone on knee flexion, hip flexion, and knee valgus during unilateral and bilateral drop jump tasks. Twenty-nine young adult females with previous athletic experience were randomly divided into a control (n = 16) and a resistance training (n = 13) groups. The resistance training group completed 8 weeks of lower extremity, weight-bearing exercises using free weights, whereas the control group did not train. A pre- and posttest was conducted to measure knee valgus, knee flexion, and hip flexion during unilateral (30 cm) and bilateral (60 cm) vertical drop jumps for maximum height. Joint angles were determined using 3-dimensional electromagnetic tracking sensors (MotionMonitor; Innovative Sports Training, Inc., Chicago, IL, USA). Initial training intensity for the bilateral squat was 50% of the subject's 1 repetition maximum (RM), which increased 5% each week to 85% during the final week. Sets and repetitions ranged from 2 to 4 and from 4 to 12, respectively. The training loads for all other exercises (lunge, step-up, unilateral squat, and Romanian deadlift) increased from 15RM to 6RM from the initial to the final week...Continue Reading

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Citations

Jun 9, 2012·Clinical Journal of Sport Medicine : Official Journal of the Canadian Academy of Sport Medicine·Robert J ButlerRobin M Queen
Jun 14, 2014·Clinical Journal of Sport Medicine : Official Journal of the Canadian Academy of Sport Medicine·Mikel R StifflerDavid R Bell
Nov 14, 2015·Journal of Strength and Conditioning Research·Harry FisherBoyi Dai
Feb 6, 2016·Journal of Strength and Conditioning Research·Zong-Rong ChenLi-I Wang
Aug 2, 2017·The American Journal of Sports Medicine·Thiago Jambo Alves LopesEvangelos Pappas
Jun 3, 2021·International Journal of Environmental Research and Public Health·Akihiro TamuraTakahiro Otsudo

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