Just because your muscles feel swollen or burn during a tough workout doesn't mean they're getting bigger—studies show that feeling the pump or having sore, burning muscles doesn't automatically lead to muscle growth.

Just pumping muscle full of burn and swelling—like when you do a ton of reps and feel that fire—doesn’t make your muscles grow bigger unless you’re also lifting heavy enough to put real stress on them.

Even if you make your muscles feel that burning, swollen 'pump' feeling during a workout by boosting certain chemicals, it doesn't actually make your muscles grow bigger—studies show muscle growth doesn't happen just from that sensation.

Even though your muscles feel swollen and burn during a tough workout, that feeling itself doesn’t actually make your muscles grow bigger—something else must be responsible.

Working out until your muscles burn and swell up doesn't actually make them grow bigger over time—those sensations are just side effects, not the real reason muscles get bigger.

Even when your muscles burn and feel fatigued during a tough workout because of buildup of certain chemicals, that burning feeling itself doesn’t make your muscles grow bigger.