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 .
INFLUENCE OF SURFACE ON MUSCLE DAMAGE AND SORENESS INDUCED BY CONSECUTIVE DROP JUMPS
This study compared the magnitude of muscle damage induced when consecutive drop jumps ( DJs ) were performed on s and vs. firm ( wood ) surfaces from a height of 0.6 m. Eight subjects performed DJs on a s and surface at a depth of 0.2 m ( S condition ) , and 8 other subjects performed DJs on a wood surface ( F condition ) . Each set consisted of 20 DJs with an interval of 10 seconds between jumps . Subjects performed 5 sets of DJs with 2 minutes between sets . Maximal isometric force , muscle soreness , and plasma cre-atine kinase ( CK ) activity were measured immediately before and immediately after the DJ exercise as well as 1 , 24 , 48 , 72 , and 96 hours after the DJ exercise . All measures changed significantly ( p < 0.05 ) after exercise for both conditions ; however , significantly ( p < 0.05 ) smaller changes in these measures were evident for the S condition than for the F condition . These results show that DJs on a s and surface induce less muscle damage than on a firm surface . Training on s and may improve aerobic capacity or strength with a low risk of muscle damage
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 .