Proper posture is crucial for optimizing physical performance as it ensures efficient movement patterns and reduces the risk of injury. Good posture aligns the body, facilitating the correct functioning of muscles and joints, allowing for greater strength and endurance during workouts. For example, proper alignment during lifting can prevent undue stress on the lower back, while optimal shoulder position enhances upper body strength. Moreover, maintaining good posture can improve breathing capacity, leading to better oxygen delivery during exercise, contributing to overall effectiveness and efficiency.