Walking on the ground. Sports parts: elbow joint and wrist joint. Energy consumption: 7.9 calories/minute. Location: Square and street with flat terrain. Walking on the ground is mainly to exercise the whole body joints, but also to exercise the sensitivity and flexibility of the joints. Before walking, raise your head slightly, look straight ahead, relax your shoulders, hold out your chest, swing your arms back and forth, and follow the ground with your feet. When walking, keep your toes off the ground and your feet on the ground. Don't let your feet move inward or outward. Stumbling uphill. Exercise parts: thigh muscles, calf muscles, knee joint, energy consumption: 2.7 calories/minute. Location: hillside, underground parking lot, stairs. Stumbling uphill exercises the endurance of leg muscles and the elasticity of knee joint. During walking, the upper body leans forward slightly, keeping a certain angle with the ground, and the arm is not allowed to swing too much. It is best not to walk with the help of external force, so as not to damage the joints, especially when the hands do not support the knees, the toes land first, and the direction of the feet cannot move inward or outward, but forward.