To get into an arm balance, placement of the hands and arms is very important. The hands or forearms should always rest right beneath the shoulders at the start of the pose. As the pelvis is lifted, the shoulders and arms can move forward to accomplish the lift and adjusted the angle. The legs also play a key role in arm balances, because when used properly, they can help lift the body and take some of the weight off of the arms. If the arm balance involves the legs placed on the arms, pressing into the legs can help the core and assist with lifting the body or pelvis off of the ground.
For inversion arm balances, the core tightens as the legs come off of the ground, and the legs stabilize to achieve the balance. It is helpful to practice these types of arm balances against a wall first until it becomes comfortable and the yogi is strong enough to practice in the middle of the room.
There are dozens of arm balances that vary from beginner to advanced poses, and they all offer a full body workout, targeting the core, arms and legs.