If your muscles of mastication are strong, you can chew food more efficiently.

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

She was massaging her nape.

He is doing special exercises to strengthen his cervical muscles.

He exercises his pectoral muscles every day.

He is increasing his muscle tone through daily training.

I work out every day to strengthen my body.

He does exercises to train his gluteus muscle every day.

The sarcolemma covers the muscle cells.

He is all muscles, just like a meathead.