Can you give me an example of sentence for muscle?

Some examples for the Word "muscle" are as follows:

The muscle inside my calf hurts.

I think I stretched a muscle in my arm.

Some examples for the Word "muscles" are as follows:

My dad has big muscles.

Does that powder that claims to build your muscles really work?

My muscles are aching from our hike yesterday.

Or use scientific ways like "the rhomdoideus major is used when the arm is lowered against a resistence such as paddling a canoe.