Bobby jump (Burpee), also called standing jump in China. It was first invented by a doctor named Bopi during World War II to test the physical fitness of new recruits for the US military. Bobby jump integrates squat, push-ups, squat and take-off, and bends the legs and abdomen, which can move more than 75% of the muscles of the whole body. Bobby jump is a collection of actions. What we usually say is the standard bobby jump, squat: squat, with both hands shoulder-width apart. Push back to the ground: push your legs back hard at the same time, becoming a palm support or push-up posture. Push-ups: Complete a push-up. Bend your legs and jump your abdomen: bend your legs and jump forward into a prone position. Vertical jump: Complete an upward vertical jump from a prone abdominal position.