It is important to exercise every day and maintain good health.

He is leading a very healthy life.

In this chemical experiment, we will examine the properties of benzoic acid.

He is doing special exercises to strengthen his dorsal interosseus muscle.

The plantar interosseus muscle is a part of the foot muscles and controls the movement of the toes.

He used a stick to measure the depth of the river.

His foot is very fast.

His running speed was surprisingly fast.

I promised him to meet tomorrow.

The speed of sound is about 343 meters per second in the air.