Objective: To determine the effects of stretching before
and after exercising on muscle soreness after exercise, risk of
injury, and athleticperformance. Method: Systematicreview. Data sources: Randomised or quasi-randomised studies identifiedby searching Medline, Embase, CINAHL, SPORTDiscus, and PEDro,
and by recursive checking ofbibliographies. Main outcome measures: Muscle soreness, incidence of injury, athleticperformance. Results: Five studies, all of moderate quality, reported
sufficient data on the effects of stretching on muscle sorenessto be
included in the analysis. Outcomes seemed homogeneous. Stretching
produced small and statistically non-significant reductions inmuscle
soreness. The pooled estimate of reduction in muscle soreness
24 hours after exercising was only 0.9 mm on a 100 mm scale (95%
confidence interval 2.6 mm to
4.4 mm). Data from two studieson army recruits in military training
show that muscle stretchingbefore exercising does not produce useful
reductions in injuryrisk (pooled hazard ratio 0.95, 0.78 to 1.16).
Conclusions: Stretching before or after exercising doesnot
confer protection from muscle soreness. Stretching beforeexercising
does not seem to confer a practically useful reductionin the risk of
injury, but the generality of this finding needstesting.
Insufficient research has been done with which to determinethe
effects of stretching on sportingperformance.
What is already known on this topic
Reviews of the effects of stretching before exercising have drawn
conflicting conclusions
The literature on effects of stretching before and after exercising on
muscle soreness and risk of injury has not been systematically reviewed
What this study adds
Stretching before and after exercising does not confer protection from
muscle soreness and stretching before exercise does not seem to confer a
practically useful reduction in the risk of injury
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