Originally Posted by Eric3237

Take squats and leg extensions...or, hell, better yet, take squats and compare them to leg extensions and leg curls done together (both isolation movements). Using the same intensity (% of 1 RM), the same frequency and rep range, etc., which is going to give you bigger legs (and a bigger body)? Squats, of course.

Also when we talk about compounds that involve the arms, everybody seems to forget about triceps. Why do people prefer shoulder presses overall instead of, say, lateral raises? And benching over db flyes? A compound, or multi-joint movement stimulates more muscle overall in a given session, resulting in greater gains, without doing set after set after set after....

Compounds allow your body to function as a unit.

Originally Posted by Eric3237

They realease more growth hormone.

Originally Posted by Eric3237

I really think, however, that the need to do or not do additional isolations depends on the program and the individual. They are COMPLEMENTARY. But I don't think that compounds should ever be replaced with isolations, unless your going for a John Basedow look.

Originally Posted by Eric3237

By definition, a compound is a multi-joint movement. Count the joints involved in BB curls.