Force-generating capacities and fatigability of the quadriceps femoris in relation to different exercise modes

Journal of Strength and Conditioning Research
Boris Ullrich, Gert-Peter Brüggemann

Abstract

In this study, we examined whether different exercise modes provoke functional differences in maximal and explosive force-generating capacities and fatigability of the quadriceps femoris (QF). Additionally, the interaction of different functional capacities was studied in competitive athletes. Ten competitive tennis players and 10 endurance athletes participated in the study. Pre-exercise force-generating capacities were determined during maximal voluntary isometric knee extensions (MVC). Fatigability of the QF was studied using sustained isometric contractions with target loads of 20% and 40% of pre-exercise MVC. Postexercise MVCs were conducted 20 seconds, 1 minute, and 3 minutes post task failure. Muscle activation of the QF during the fatiguing exercises and postexercise MVCs was estimated using surface electromyography. Higher explosive force-generating capacities, but no differences in absolute moments, were detected in tennis players compared with endurance athletes. Fatigability of the QF during both fatiguing tasks was approximately the same in both athletic populations. This was indicated by minor group differences in endurance time, postexercise MVC production, and electromyography (EMG)-estimated muscle activation d...Continue Reading

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Citations

Jan 14, 2010·Ergonomics·Laura A Frey Law, Keith G Avin
Jan 11, 2011·Journal of Athletic Training·Mary F PatrekScott T Doberstein
Nov 12, 2019·Sports Health·Matthew J JacksonOmid A Khaiyat

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