各種速度条件下の歩行・走行における筋活動量と酸素需要量の関係

抄録

The purpose of this study is to examine the relationship between the amount of muscle electrical activity and oxygen requirement as to the speed changes in walking and running, and also to determine electromyographically the optimum speed and the metabolic intersection speed of walking and running, that were reported by former investigators.
Twenty-two young trained male adults participated in the experiment. They were all athletes who belonged to university sports clubs.
EMG activity in the right leg w as measured through two surface electrodes placed 2.5cm apart on the belly of each muscle as shown below. The following muscles were monitored in all subjects.
Tibialis anterior (T.A.), Soleus (So.), Gastrocnemius (L.G.), Vastus medialis (V.M.), Rectus femoris (R.F.), Biceps femoris (B.F.), and Gluteus maximus (G.M.).
The subjects O.O. and U. E. had additional muscles monitored as described below:
Rectus abdominis (R.A.), Sacrospinalis (Sac.), Deltoid anterior portion (D.A.), Deltoid posterior portion (D.P.), Triceps brachii (T.B.), and Trapezius (Trape).
The EMG signal was amplified and recorded by a multipurpose electr oencephalograph (San-ei Type IA-14) (paper speed: 3cm/sec, sensitivity: 6 mm/O.5mV, time constant: 0.01 sec). Simultaneously it was integrated with a Miller's circuit (Nihonkouden Integrator RFG-5).