Because your muscles are contracting and blood is filling the muscles being worked ( thats why your veins bulge when lifting)
about 15 or 20 minutes.
because in order to keep functioning your muscles need oxygen that carried by the blood, to produce ATP.
you're muscles need more oxygen which is carried in you're blood. this is why you breathe faster as well.
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.
muscles are at work All the time>
muscles work my legs
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.
Oxygen when water is pumped through their anus using the muscles of their cloaca.
A warm up prepares the muscles for work.
Cross trainers work out many muscles but mainly they work out the abdominal and arm muscles.
size; growth
There are several muscles working when pitching. Starts of with the abductor muscles when striding. leg muscles such as the calf, quads and hamstring work when push of happens. then shoulder girdle, lats and biceps work as arms rotate. Core muscles work for rotation