Unlock the Secret Behind “The Pump”: Is Chasing It Fueling Your Gains or Wasting Your Time?
Let’s take a look at the research.
What Actually Happens During the Pump
The pump is a temporary swelling of the muscles that comes from lifting moderately heavy weight at high reps. The scientific name for the pump is “transient hypertrophy.”
While the pump is often associated with the biceps, you can get a pump in other muscles as well, including the chest, delts, and quads.
When performing multiple reps of an exercise like the dumbbell curl, the repeated muscle contractions compress your veins — the blood vessels responsible for carrying blood away from your muscles. At the same time, your arteries, which deliver oxygen-rich blood to your muscles, continue pumping in an increasing supply. Blood keeps flowing in while the outflow is restricted.
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