The effects of intermittent-running training on the histochemical properties of nerve cell and Animals were subjected to a training program consisting of 30-sec treadmill running interposed with 90-sec rest period and were trained 20 times a day at 50m/min during 4 weeks. After the training, statistitally significant change in fibre distribution occurred in the superficial regions of tibialis anterior and plantaris muscles, where the percentage of FOG fibre increased and there was a concomitant decrease in the FG fibre percentage. Furthermore, in the deep regions of plantaris and gastrocnemius muscles, there were increase in the FOG fibre and decrease in FG fibre, respectively. In the large (>45μm) and medium (25-45μm) neurons; oxidative capacity increased after the training. With a histochemical analysis of motor unit type, the oxidative capacity in both fast twitch and slow twitch alpha motor units increased through the intermittent-running training.