Before revision: Hand stands free from a wall with fingers pointing behind would use gripping stretching to stabilize the hand to prevent the body from falling towards the front, and extensor muscles to prevent the body from falling towards the back.
After revision: Handstands free from a wall with fingers pointing behind would use gripping stretching to stabilize the hand to prevent the body from falling towards the front, and extensor muscles to prevent the body from falling towards the back.