The global effects of differing durations of static stretching within a full warm-up protocol on subsequent voluntary performance and evoked contractile properties

Reid, Jonathan Christopher (2017) The global effects of differing durations of static stretching within a full warm-up protocol on subsequent voluntary performance and evoked contractile properties. Masters thesis, Memorial University of Newfoundland.

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Abstract

The evidence for performance decrements with prolonged static stretching (SS)(>60s per muscle group) has led to a paradigm shift in optimal stretching routines within a full warm-up protocol. Many athletic teams and individuals have now incorporated dynamic stretching (DS) and dynamic activity (DA) rather than SS into their pre-exercise warm-up routines. However, much of the previous research examining SS did not incorporate all three components of a full warm-up protocol (aerobic, SS and DS/DA activity). Based on previous literature, the objective of the present study was to compare differing durations of SS (30, 60, and 120 seconds per muscle group or a control condition with no SS) within in a full warm-up protocol on various testing measures. Sixteen male participants (Sixteen males; 27.6 ± 2.15 years, 187.1 ± 15.3 lb. and 181.9 ± cm) with an athletic background and at least 2 years of strength and endurance training experience completed four conditions, each condition included a prior submaximal 5-minute aerobic warm-up on a cycle ergometer, one of the four SS interventions (0, 30, 60 or 120s per muscle group) and a subsequent DS/DA component. Results of the present study serve as evidence that prolonged durations of SS (SS 120s) per muscle group, even with the inclusion of a DS/DA component can impair subsequent performance in vertical jump height, force production and rate of force production, evoked contractile properties and potentiated twitch forces, and the interpolated twitch technique. Results also show that ROM continues to increase immediately following each of the three components within the warm-up (aerobic, SS and DS/DA) in all conditions.

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