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Because your muscles are contracting and blood is filling the muscles being worked ( thats why your veins bulge when lifting)

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13y ago

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How long do muscles stay pumped after weightlifting?

about 15 or 20 minutes.


Why muscles must have blood pumped to them?

because in order to keep functioning your muscles need oxygen that carried by the blood, to produce ATP.


When your active why does more blood get pumped to the muscles?

you're muscles need more oxygen which is carried in you're blood. this is why you breathe faster as well.


What muscle groups can you work out with exercise bands?

With exercise bands, you can work out tons of muscles. Muscles that you can work out are arm muscles, leg muscles and back muscles. With leg muscles, you can work out the thighs, and calves muscles.


Why do muscles look smaller after a workout?

Muscles may appear smaller after a workout due to temporary swelling and inflammation caused by the stress of exercise. This can make the muscles appear less defined or "pumped" immediately after a workout.


When muscles are at work?

muscles are at work All the time>


How do muscles work when you are jumping?

muscles work my legs


Why do sea cumbers breth threw there anus?

Oxygen when water is pumped through their anus using the muscles of their cloaca.


What prepares the muscles for work?

A warm up prepares the muscles for work.


While it is true stetching a pumped muscle will make it appear visibly smaller it does not decrease the muscles?

size; growth


Is it necessary for your muscles to be stiff after exercise?

If you aren't feeling anything the next day or even the day after then you might need to work harder the stiffness would be what is called a " Pump " and yes if you have worked hard enough it should be nice and pumped up!


What muscles are used in cross trainer?

Cross trainers work out many muscles but mainly they work out the abdominal and arm muscles.