She was massaging her nape.

He has strong masseters, so he can easily bite through hard food.

The sarcolemma covers the muscle cells.

He is increasing his muscle tone through daily training.

He exercises his pectoral muscles every day.

He does exercises to train his gluteus muscle every day.

I work out every day to strengthen my body.

The fascia is an important part that wraps around the muscles.

When he gets angry, his veins that bulge when he is angry become visible.

He is all muscles, just like a meathead.