That muscle 'pump' you feel when lifting weights? It might feel like growth, but this claim says it doesn't actually cause your muscles to get bigger over time.

Just because your muscles feel swollen and pumped after a workout doesn't mean they're going to get bigger over time—studies show that even if some people get way more pumped than others, they all end up with about the same muscle growth in the long run.

When your muscles burn and swell up during a tough workout, that feeling isn't actually what makes your muscles grow bigger—other things are responsible for the growth.

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.

When you lift weights, your muscles grow because of the physical pulling and stretching forces they feel—this is thought to be the main reason they get bigger.