RESUMO
BACKGROUND: Massage is widely used in exercise-induced skeletal muscle damage (EIMD). It has been proven that massage can improve the morphology and function of damaged skeletal muscle in multiple ways. However, whether massage can protect skeletal muscles from injury during long-term heavy-duty exercise has not yet been determined. METHODS: In this study, a rat model of overuse injury was established by eccentric running for 4 weeks, and pressing at constant pressure and frequency and massage were used as intervention methods to explore whether massage could protect skeletal muscle from injury through upregulating integrin and the basement membrane laminin. RESULTS: The results showed that compared with the model group, the ultrastructure of skeletal muscle in the massage group was relatively complete and clear, and the maximum isotonic and tetanic contraction forces were significantly increased (P < 0.01). In addition, in the massage group, ß1 integrin expression was significantly increased, p-FAK protein expression was decreased, and the co-localization of ß1 integrin and the basement membrane laminin 2 was significantly increased (P < 0.01). CONCLUSION: Our study shows that during long-term heavy-duty exercise, massage can enhance the cell adhesion function mediated by integrin ß1 and laminin 2 to protect skeletal muscle from injury and prevent the occurrence of overuse injury.