ABSTRACT Objective To study the effects of contusion and exhaustive exercise on expression degradation-related factors MuRF1 MAFbx in skeletal muscle rats describe repair mechanism injury. Methods Forty-two male SD were randomly divided into 7 groups. The each group killed at different time points (0h, 24h, 48h) after (E0, E24, E48) (D0, D24, D48), respectively, resting state control (C). right...