“Runners have their ‘high’ and bodybuilders have their ‘pump’—the feeling of euphoria brought on by the rush of blood that causes your muscles to swell during a weight workout,” explains personal trainer Mike Creamer of Anatomically Correct in NYC. Read on to find out what’s actually happening there, how to max it out—and whether or not you can take it too far.
So what’s actually happening here?
The pump happens in response to intense strength training. Muscular contractions cause blood vessels to dilate and blood flow to increase. All that activity in the muscles causes them to expand. A lot.
“During an intense workout, a pumped upper arm could measure a full half-inch more than it normally does,” Creamer says. Alas, the effect is temporary, lasting at most a couple of hours.
How do I get a max pump?
To get that volume, you must do volume. “A good pump in the targeted muscles can usually be achieved by performing three or four sets of moderate to high reps (10 to 15) of an exercise to momentary muscular failure,” Creamer says.
Keep your tempo slow and really focus on the contraction of the muscles, take short rest periods, and do supersets of opposing muscle groups (say, biceps and triceps) to enhance the effect.
“Making sure you’re well hydrated and taking in enough carbs before your workout will also facilitate a good pump, as will creatine supplementation; these all contribute to increasing the muscle-cell volume,” says Creamer.
So should my goal be to always get pumped?
“There is cellular research showing that cell swelling increases protein synthesis and decreases protein breakdown,” explains Brad Schoenfeld, Ph.D., C.S.C.S., author of The M.A.X. Muscle Plan.
“If these results translate into practice during resistance training, then it would have a positive effect on increasing muscle growth—but we simply don’t have the ability to test for it.”
Plus, as Creamer points out, always working at the intensity required for a good pump may result in overtraining, which can be counterproductive to your longer term goal of actual, lasting muscle growth. So enjoy it when it happens, and make it happen when you want to enjoy it.