Muscle Energetics during Exercise by ³¹P NMR

Abstract

Previous studies have shown that a decrease in muscle tension is not proportional to decrease in the ATP concentration and free energy for ATP degradation but is proportional to the decrease in ATP consumption during muscle contraction, and that the free ADP concentration in the cell can be estimated using the Pi/PCr ratio obtained by ³¹P NMR. From this view, we discuss findings on muscle energetics during exercise that have been clarified by ³¹P NMR and its future problems.