If you're a guy who's new to lifting and you do both big compound moves and isolated triceps exercises, your triceps will grow more than if you only do one type — not because the exercises add up, but because they hit different parts of the muscle in different ways.

If you're a young guy who hasn't trained much before, doing exercises like the bench press will make the back part of your triceps grow way more than just doing arm-only exercises like lying triceps extensions.

If you're a young guy who hasn't trained much before, doing exercises that only move your elbow (like lying triceps presses) makes your triceps muscle grow way more than doing exercises like bench presses that use multiple joints at once.

If you're a guy who hasn't trained much before, your triceps muscle in the back of your arm grows about the same no matter if you do push-ups, triceps extensions, or a mix of both — the type of exercise doesn't really matter for this part of the muscle.

If you're a guy new to lifting and you start your workout with big compound moves like the bench press instead of isolation exercises, your chest muscles grow more—probably because you're not too tired when you do the main exercise.

Not all parts of your thigh and calf muscles grow the same way — some parts grow better with certain exercises, so doing different types of lifts can help you build muscle more evenly.