Soccer. Continuously exercising every muscle in your body (soccer) is a more effective way of building muscle mass than sporadically exercising a few muscles in shorter intense bursts (cheer).

A hard day of intense exercising should be followed by an easier day with a lighter workout.

not running at all

If you are so out of breath that you cannot talk while exercising, your exercise level is too intense.

During intense physical activity, glycogen; which is energy stored in muscle cells, is used during intense muscle contractions.