It will make your muscles squeeze, but there is no movement to reconcile per request. The arms and legs, such as muscle, push the walls of this type of exercise causes muscles to grow stronger, but not a good cardiovascular system.
Squeeze the muscles But there is no movement to reconcile the arms and legs as muscular strain, pressure walls. This type of exercise makes muscles grow stronger cardiovascular system, but not better.
To make muscle compression. But there is no movement, ask for forgiveness. The arms and legs, such as muscle, push the wall, this type of exercise muscle growth, strong but the cardiovascular system is bad.