Drop-mass equipment was development to produce non-invasive contusion in rat soleus muscle. After deep anesthesia right hindlimb suffered the trauma and both soleus were analyzed 1, 4, and 6 days after single contusion (1x), and 6 and 30 days after periodic contusions. Frozen muscles were cut at proximal and medial region in cryostat and alternate serial cross-sections (10μm) stained with Toluidine Blue and for Acid Phosphatase, Acetylcholinesterase (AChE) and Myofibrillar ATPase activity. Soleus after single contusion: there was not significant difference in right soleus muscle weight, when compared with the left one. There were abundant acute signs of lesion in right soleus in both proximal and medial region. AChE activity was identified in regeneration segments of rightsoleus evaluated after 4 and 6 days. Soleus after periodic contusions: there was an increase in right soleus weight after 6 days when compared with the left one (0.2699 ± 0.049versus 0.2364 ± 0.038, Duncan test, α=5%). Acute signs of injury were found in right soleus after 6 days, but not after 30 days. Chronic signs of injury predominated in right soleus when compared with acute signs. Right soleus showed split fibers with AChE activity. Split fibers showed 1 to 6 fragments, belonging to different histochemical fiber types. Thirty days after recurrent contusions, a small increase in the incidence of IIc type fibers was identified in the rightsoleus when compared with the left one. The equipment developed to produce trauma was efficient to produce contusion in rat soleus muscle which permitted the analyzes of different stages of muscle fiber recovery after single and periodic contusions.