lactic acid
There are many muscles in the body that are used in a roundhouse kick. The abs are used, side muscles, thigh muscles, and the butt muscles.
They contract and release to move your body
ATP is used by the body as a source of energy for the muscles.
Your Heart!
11 muscles are used in your body while talking.
Most of the muscles of the body are exercised when running. Of course the foot and leg muscles are needed the most but the muscles of the torso and upper body are used as well.
The gluteus muscles are used when walking. They support the upper body in an upright posture.
the tongue and jaw
lower body parts
your leg muscles mostly and you also move your whole body really
Yes.
Mainly lower body muscles - legs, feet etc. But the upper body does get some use.