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 Pre-Exercise Muscle Temperature on Responses to Eccentric Exercise.
OBJECTIVE : We tested the hypothesis that altering the pre-exercise muscle temperature would influence the magnitude of muscle damage induced by eccentric exercise . SUBJECTS : Female students who had no experience in resistance training were placed into either a  microwave treatment group ( n = 10 ) or an icing treatment group ( n = 10 ) . DESIGN AND SETTING : Subjects in each group performed 12 maximal eccentric actions of the forearm flexors of each arm on 2 separate occasions separated by 4 weeks . Before testing , the exercise arm was subjected to either passive warming ( microwave ) or control for the microwave treatment group or cooling ( icing ) or control for the icing treatment group . The control arm performed the same exercise protocol without treatment . Limbs were r and omized for treatment or control and order of testing . Deep muscle temperature increased by approximately 3 degrees C after the microwave treatment and decreased approximately 5 degrees C after the icing treatment . MEASUREMENTS : We evaluated changes in maximal isometric force and indirect markers of muscle damage , including range of motion , upper arm circumference , muscle soreness , and plasma creatine kinase activity , in the microwave and control and icing and control groups using a 2-way , repeated- measures analysis of variance . RESULTS : All measures changed significantly ( P < .01 ) after exercise , but neither of the treatments demonstrated significant effects on most of the variables compared with the control . CONCLUSIONS : These results suggest that pre-exercise cooling does not affect the magnitude of muscle damage in response to eccentric exercise . Similarly , pre-exercise passive muscle warming did not prove beneficial in attenuating indicators of muscle damage . Thus , any beneficial effects of warm-up exercise can not be attributed to the effects of increased muscle temperature
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 .