If you lift the same total amount of weight each week, it doesn’t matter whether you spread it out over one day or three+ days—you’ll still gain about the same amount of muscle, no matter if you’re experienced or if you’re training your arms or legs.

If you lift weights more often each week—like 3 or more days instead of just once—you might see a little more muscle growth, but only if you’re not doing the same total amount of lifting in both cases.

If you lift weights the same total amount each week, it doesn’t really matter whether you do it in one big session or spread it out over several days—your muscles will grow about the same either way.

If you lift weights more often each week, you’ll likely get stronger faster—but that doesn’t always mean your muscles will get bigger. Strength and muscle growth might not follow the same rules.

If you're a young guy lifting weights more often each week, you'll likely get stronger faster—but that doesn't mean your muscles will get noticeably bigger.

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.