Conclusion Overall , our findings do not support the presence of a secondary loss of strength following an acute muscle injury , and strongly suggest that strength , on average , recovers steadily over the first 3 days post-injury
Background An immediate loss of strength follows virtually all types of muscle injury but there is debate whether the initial strength loss is maximal or if a secondary loss of strength occurs during the first 3 days post-injury .
Objective The objective of this analysis was to conduct a systematic review and meta- analysis of the research literature to determine if a secondary loss of strength occurs after an injurious initiating event .
A light load eccentric exercise confers protection against a subsequent bout of more demanding eccentric exercise.
This study investigated the hypothesis that a light eccentric exercise ( ECC ) that does not induce a loss of muscle function and delayed onset muscle soreness would confer a protective effect against a more strenuous ECC . Eighteen young men were r and omly placed into two groups : 10 - 40 % ( n=9 ) and 40 % ( n=9 ) . Subjects in the 10 - 40 % group performed ECC of the elbow flexors ( six sets of five reps ) using a dumbbell set at 10 % of maximal isometric strength ( MVC ) at an elbow joint angle of 90 degrees , followed 2 days later by ECC using a dumbbell weight of 40 % MVC . Subjects in the 40 % group performed the 40 % ECC only . Changes in MVC , range of motion ( ROM ) , upper arm circumference ( CIR ) , plasma creatine kinase ( CK ) activity and muscle soreness before , immediately after , 1 - 5 and 7 days following the 40 % ECC were compared between groups by a two-way repeated measures ANOVA . No significant changes in any of the criterion measures were found immediately and 1 - 2 days after the 10 % ECC . Following the 40 % ECC , the 10 - 40 % group showed significantly ( P<0.05 ) smaller decreases in MVC and ROM , and smaller increases in muscle soreness compared with the 40 % group , but no significant differences between groups were evident for CIR and plasma CK activity . These results suggest that the 10 % ECC induced some protection against a subsequent bout of 40 % ECC performed 2 days later . It appears that the light eccentric exercise preconditioned the muscles for exposure to the subsequent damaging eccentric exercise bout
Conclusion Overall , our findings do not support the presence of a secondary loss of strength following an acute muscle injury , and strongly suggest that strength , on average , recovers steadily over the first 3 days post-injury
Background An immediate loss of strength follows virtually all types of muscle injury but there is debate whether the initial strength loss is maximal or if a secondary loss of strength occurs during the first 3 days post-injury .
Objective The objective of this analysis was to conduct a systematic review and meta- analysis of the research literature to determine if a secondary loss of strength occurs after an injurious initiating event .