He hyperventilated due to tension.

They are working in sync, as if they are breathing together.

He was taken to the hospital because of dyspnea.

Fish use their respiratory organs to take in oxygen underwater.

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

This river is three long.

He is doing special exercises to strengthen his abductor digiti minimi.

I started exercises to strengthen the abductor hallucis muscle.

He has gotten used to living in a foreign country.

He couldn't say anything about issues outside of his field of expertise.