A man waves his arms, while walking. This is

When a man walks waving his arms, it is basically to maintain balance and relieve the tension in his body, thus allowing him to walk more smoothly and with greater coordination. This movement is part of human locomotion and serves several biomechanical and physiological purposes.

Walking is an upper and lower body activity that involves coordinated motion between the two. As the legs alternate in walking, the arms naturally swing in opposition to the legs. For instance, while the right leg is moving forward, the left arm is swinging forward, and the same applies vice versa. This arm swing helps counterbalance the rotational forces produced during the movement of the legs and torso. In doing so, it prevents the body from twisting and straining the spine excessively, thus improving stability generally.

Furthermore, the swinging motion when a person walks helps conserve some form of energy. First of all, the rhythm controls unnecessary muscular tension between two opposing body momentum parts hence using fewer core muscles at more times to stabilize it into perfect movement. It is the natural rhythm that makes walking smooth.

Therefore, waving arms while walking is not about changing velocity or fighting gravity. It is a biomechanical adaptation to reduce tension, promote balance, and ensure efficient movement during walking.