MRI Assessment of Slow Training Effect on Focal Fat Metabolism in Skeletal Muscle

Yoshikazu Okamoto¹, Shintaro Mori², Tomonori Isobe²

Eleven volunteers in group A performed gcalf raiseh training regularly for 3 months, and were followed by proton (H1) magnetic resonance spectroscopy (H1-MRS) in 3 Tesla. Twelve volunteers in group B (control) performed no training .Slow training (calf raise) exercise appeared to induce a gradual decrease after 1 month of training in intramyocellular lipid (IMCL) showing statistically significant at the end of training (P<0.05). Extramyocellular lipid (EMCL) and calf muscle size did not markedly change. We clarified a novel, long-term slow training effect that can decrease focal IMCL content of skeletal muscle using MRI.