抄録
Previous study of walking includes a lot of biomechanics research evidence and electromyographic (EMG) discuss, and there were various knowledge of physiological experience. However, many of EMG reports were differential walking physical environments and changes of walking speed at forward, backward studies were few. The aim of this study was to investigate EMG activity during various speed of walking and to different each speed of forward (FW) and backward walking (BW). Eight subjects participated in this experience after informed consent that walked forward and backward each 5 minute in order of three different speeds; 2, 4, 6 km per hour on the treadmill, while there motion, ground contact information, and EMG activity from follow muscles (elector spinae, gluteus maximus, rectus femoris, vastus medialis, biceps femoris, tibiralis anterior, medial gastrocnemius, and soleus) were recorded. The EMG data rectified all waves, and calculated the integrated EMG (iEMG). Furthermore iEMG was normalized of FW at 2km per hour. Statistical processing used one way repeated measures of ANOVA (= 0.05). EMG activity has increased with the rise of walking speed. Comparison of FW and BW at the same speed, especially TA muscle activity was significantly high value than FW. Consequently, EMG activity of BW was different from FW and selectively active. Meanwhile Sol muscle activity was an insignificant effect in all test. It was consider that muscle atrophy of aging was prevented on BW, and could apply one of the training for aged person. [J Physiol Sci. 2007;57 Suppl:S188]
