Form follows function: how muscle shape is regulated by work. (palavanfitness.com)
In contrast, a female bikini competitor's main focus would be on muscle shape, size and balance, as well as conditioning. (ballingerathleticperformance.com)
At the very opening of your stomach is a tight band of muscle shaped like a ring that relaxes and contracts to let food in — it's called the lower esophageal sphincter (LES). (positivemed.com)