The ballerinas around the walls are stretching their legs and feet so their muscles will not become stiff.

Their muscles are stiff.

He has been working out to develop his muscles.

The hot bath relaxed my muscles.

I have sore muscles all over my body.

My whole body is sore.

Swimming will develop many different muscles.

Swimming develops our muscles.

The heart is made of muscle.

I always stretch my leg muscles before playing tennis.

My muscles ached from playing tennis too much.

My muscles have become soft.

My muscular strength has weakened from lack of exercise.

Exercise trains the muscles.

Hence 50 percent of the muscle can give way to fat.

Each muscle shows perfect teamwork.

The runner has firm muscles.

Sports help to develop our muscles.

You need to have strong thigh muscles to skate.

This medicine helps relieve muscle pain.