Figure 7

Axial T2-weighted images (repetition time = 2,500 ms, echo time = 80 ms) of the right leg before and at day 4 post-exercise. Increased signal intensity was more prominent in the MG on post-exercise T2-weighted image (MG: medial gastrocnemius; LG: lateral gastrocnemius; and SOL: soleus). This increased signal intensity reflects increased fluid content within the MG. In particular, the size of the MG apparently increased at day 4 after exercise, likely due to the edema formation.