How Do Pronation And Supination Affect Baseball Pitching Arm Slot? - The Baseball Xpert

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Forearm Supination ✨ Dive into the fascinating mechanics of turning your palm upwards through our latest animation! While the supinator muscle might sound like the star of forearm supination, it's actually the biceps brachii that plays the leading role. It not only flexes the elbow but also acts as a powerful supinator, particularly when the elbow is at a 90° angle. This muscle is the main contributor to the strength behind the motion. 💪 So, every time you open a jar or greet a friend with a wa