Neuromuscular fatigue of the knee extensors does not differ following repeated maximal intensity leg cycling sprints interspersed with 30s and 180s of rest

Monks, Michael R. (2016) Neuromuscular fatigue of the knee extensors does not differ following repeated maximal intensity leg cycling sprints interspersed with 30s and 180s of rest. Masters thesis, Memorial University of Newfoundland.

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Abstract

The objective of this thesis was to examine the development of neuromuscular fatigue during a leg-cycling repeated sprint exercise interspersed with short and long duration recovery times. Ten recreationally active males completed two sessions of ten 10s sprints, interspersed with either 30s or 180s of recovery. Participants completed a knee extensor maximal voluntary contraction (MVC) with interpolated twitch technique (ITT) protocol pre-, mid-, and post-repeated sprint exercise. Participant’s peak power was significantly higher during sprint 5 and 10, but not sprint 1, when sprints were interspersed with 180s of rest compared to 30s of rest. Post-sprint 5 there was a significant decreased in MVC force and potentiated twitch force. Post-sprint 10 participant’s voluntary activation was significantly decreased. There was no difference between groups for knee extensor MVC force, potentiated twitch force or voluntary activation. Results indicate that a longer recovery time may improve repeated sprint performance but not improve neuromuscular function.

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