I strained a muscle at the gym yesterday.

I work out every day to strengthen my body.

It's important to train your antagonist muscles as well when doing muscle training.

I go to the gym every day to build my muscles.

This river is three long.

He works at the blacksmith's every day to forge his skills.

There is intense rivalry between them.

They fiercely rivaled each other in the soccer match.

Health is very important.

His opinion is very important.