Stretching to prevent or reduce muscle soreness after exercise
Abstract
Background
Many people stretch before or after (or both) engaging in athletic activity. Usually the purpose is to reduce risk of injury, reduce soreness after exercise, or enhance athletic performance.
Objectives
The aim of this review was to determine effects of stretching before or after exercise on the development of post‐exercise muscle soreness.
Search methods
We searched the Cochrane Bone, Joint and Muscle Trauma Group Specialised Register (to April 2006), the Cochrane Central Register of Controlled Trials (The Cochrane Library 2006, Issue 2), MEDLINE (1966 to May 2006), EMBASE (1988 to May 2006), CINAHL (1982 to May 2006), SPORTDiscus (1949 to May 2006), PEDro (to May 2006) and reference lists of articles.
Selection criteria
Eligible studies were randomised or quasi‐randomised studies of any pre‐or post‐exercise stretching technique designed to prevent or treat delayed‐onset muscle soreness (DOMS), provided the stretching was conducted soon before or soon after exercise. To be eligible studies must have assessed muscle soreness or tenderness.
Data collection and analysis
Methodological quality of the studies was assessed using the Cochrane Bone, Joint and Muscle Trauma Group's methodological quality assessment tool. Estimates of effects of stretching were converted to a common 100‐point scale. Outcomes were pooled in a fixed‐effect meta‐analysis.
Main results
Of the 10 included studies, nine were carried out in laboratory settings using standardised exercise protocols and one involved post‐exercise stretching in footballers. All participants were young healthy adults. Three studies examined the effects of stretching before exercise and seven studies investigated the effects of stretching after exercise. Two studies, both of stretching after exercise, involved repeated stretching sessions at intervals of greater than two hours. The duration of stretching applied in a single session ranged from 40 to 600 seconds.
All studies were small (between 10 and 30 participants received the stretch condition) and of questionable quality.
The effects of stretching reported in individual studies were very small and there was a high degree of consistency of results across studies. The pooled estimate showed that pre‐exercise stretching reduced soreness one day after exercise by, on average, 0.5 points on a 100‐point scale (95% CI ‐11.3 to 10.3; 3 studies). Post‐exercise stretching reduced soreness one day after exercise by, on average, 1.0 points on a 100‐point scale (95% CI ‐6.9 to 4.8; 4 studies). Similar effects were evident between half a day and three days after exercise.
Authors' conclusions
The evidence derived from mainly laboratory‐based studies of stretching indicate that muscle stretching does not reduce delayed‐onset muscle soreness in young healthy adults.
PICOs
Plain language summary
Stretching to prevent or reduce muscle soreness after exercise
Many people stretch prior to or after engaging in physical activities such as sport. Usually the purpose is to reduce the risk of injury, reduce soreness after exercise, or enhance athletic performance.
The review located 10 relevant randomised trials looking at the effect of stretching before or after physical activity on muscle soreness. The trials were mostly small and of questionable quality. Nine were conducted in laboratories using standardised exercises. Only one study examined the effect of stretching on muscle soreness after sport. Three of the studies examined the effects of stretching before physical activity and seven examined effects of stretching after physical activity.
The 10 studies produced very consistent findings. They showed there was minimal or no effect on the muscle soreness experienced between half a day and three days after the physical activity. Effects of stretching on effect on other outcomes such as injury and performance were not examined in this review.
