They focused on the muscles involved in the exercise: pectoralis major, pectoralis minor, anterior deltoids, medial deltoids, and triceps brachii. Muscle hypertrophy refers to muscle growth or ...

We call these the pecs for short. (There is also a pectoralis minor; it’s a tiny muscle that lies underneath the pec major.) The pecs originate on your sternum (breastbone, in the middle of your ...

But it needn't be that way. If you want huge pecs you'll need to challenge all of your chest muscles. But, you can't target all of your chest muscles if you don't know what they are, can you?