earticle

영어

The objective of this study is to determine the effects of static and dynamic stretching exercises on the gastrocnemius muscle-tendon properties by use of ultrasonography. Twenty healthy adults participated in the present study. The subjects were asked to engage in static and dynamic stretching exercises of the gastrocnemius for 30 sec each in 2 sets. Ultrasonography to measure the displacement of the myotendinous junction (MTJ) was performed at the 0 sec, 30 sec, 60 sec, 180 sec, and 300 sec after the stretching exercises. A significant displacement of the static stretching was observed between the 0 sec and 30 sec, and between the 180 sec and 300 sec (p<0.05), with no significant changes between the 30 sec and 180 sec. And dynamic stretching exercise showed more significant displacement in the all conditions compared with static stretching (p<0.05). The displacement of the MTJ position was observed in proximal parts, and dynamic stretching appeared to make the change in distal parts. Therefore, static and dynamic stretching exercises of the gastrocnemius showed different change rate and position displacement direction.