General
the pump
What does the pump mean?
The satisfying post-set swelling of a worked muscle as blood floods the tissue, a hallmark sensation of resistance training.
"Nothing beats chasing the pump on a good chest day."
Origin
Bodybuilding vernacular; 'the pump' popularised in gym culture and Arnold-era lore.
Frequently asked questions
What is 'the pump' in bodybuilding?
It's the temporary swelling and fullness a muscle gets during and after training as blood floods into the worked tissue.
Why do lifters chase the pump?
The pump feels satisfying, makes muscles look bigger and fuller in the moment, and is often used as a sign that a muscle is being worked well.
Does the pump last?
No, the visible fullness is temporary and subsides within an hour or so after training as blood flow returns to normal.
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