What is the action of pronation?

Pronation refers specifically to the rotational movement of the forearm that causes the palms to face downwards. This action involves the radius rotating over the ulna, leading to the palms being turned away from the body rather than towards it. This movement is essential in various activities, such as when performing push-ups or during specific weightlifting exercises where a palm-down position is required to stabilize or direct force effectively. The understanding of pronation is also crucial in sports and rehabilitation contexts, as it can influence both performance and injury risk by affecting the alignment and movement patterns of the upper limb.