For this exercise, first lie on your back, bend your knees and put your hands by your ears.
Tips
usage
仰卧 (face up) pairs with 俯卧 (face down) and 侧卧 (on one's side). These are the words of exercise instructions, medicine and first aid; in conversation people say 躺 or 平躺. The sit-up, 仰卧起坐, is named after its movement: lie back, rise, sit.