Doing more sets, reps, and lifting heavier weights doesn’t always mean you’ll grow bigger muscles—some people see big gains with less volume, while others don’t grow much even with more work.

Just because your muscles get bigger from lifting weights doesn't mean you'll get much stronger — the two don't really go hand in hand.

Lifting weights more often each week helps you build bigger muscles and get stronger, but after a certain point, you don’t gain much extra strength—though your muscles can still grow. If you keep the same total amount of lifting, doing it in more frequent, lighter sessions helps strength more than muscle size.

More lifting helps, but only up to a point—after that, each extra set gives you less and less benefit, no matter if you’re trying to grow muscle or get stronger.

Doing more sets in your weight workouts might actually make you gain less muscle—each extra set could slightly reduce your muscle growth, so more isn’t always better.

If you're already fit and lift weights, doing anywhere from 5 to 20 sets per muscle group each week will make you stronger and build more muscle — and it doesn't matter much which number you pick within that range.