A member asked:

After a good workout or in the time of workouts my muscles feel big and feel like they are going to explode out of my skin why does that happen?pumped

5 doctors weighed in across 2 answers

Vascular dilation: Your muscles get engorged with blood which makes them larger. This is the natural response when muscles are being used and demand more blood--therefore they temporarily grow. Over time (long term) they increase in size because of muscle fiber hypertrophy. This is what makes them larger and stronger.

Answered 11/28/2017

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Increased blood supp: After a rigorous work out, there is increased blood supply to the muscles creating a feeling of pumped, full feeling and sometimes feeling of pulsating.

Answered 10/3/2016

5.8k views

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