Figure 1

A. Time course of exercise induced changes in the left calf muscles of a 30 year old male volunteer. Axial T1 (top row), T2 (middle row) and T2* (bottom row) maps acquired before exercise (Pre), immediately after exercise (Post 1), at ~20 minutes (Post 9) and at ~45 minutes (Post 18) are shown. B. Exercise-induced time course changes of mean T1 (a), mean T2 (b) and mean T2* values (c) of the four calf muscle groups in 24 volunteers before (Pre) and after exercise (Post_1 to 18 - ~2:20 minute intervals). Graph in blue - TA, red - Sol, green - MG and purple - LG.