A handstand is the act of supporting the body in a stable, inverted vertical position by balancing on the hands. In a basic handstand the body is held straight with arms and legs fully extended, with hands spaced approximately shoulder-width apart. There are many variations of handstands, but in all cases a handstand performer must possess adequate balance and upper body strength.
Handstands are performed in many athletic activities, including acro dance, cheerleading, circus, yoga, and gymnastics. Some variation of handstand is performed on every gymnastic apparatus, and many tumbling skills pass through a handstand position during their execution.
en.wikipedia.org/wiki/Handstand
Hand balancing is the performance of acrobatic body shape changing movements, or stationary poses, or both, while balanced on and supported entirely by one’s hands or arms. It is performed by acro dancers, circus performers, gymnasts, and sports acrobats. Hand balancing may be performed by partners or individuals.