这些伸展运动有助于放松你紧绷的肩部肌肉。

These stretches will help ___relax your tight shoulder muscles.

按摩之后，我小腿上紧绷的肌肉开始放松了。

After massaging it, the tense muscle in my calf began to ___relax.

洗个热水澡可以放松你僵硬的背部肌肉。

A warm bath can ___relax your stiff back muscles.