How long should each stretch be held during the warm-up?

Holding each stretch for 10 seconds during a warm-up is ideal as it provides sufficient time for the muscles to elongate without overstraining them. This duration allows the body to start increasing blood flow to the muscles, making them more pliable and reducing the risk of injury. Holding stretches for too short a duration, like 5 seconds, may not provide adequate benefits, while stretching for longer durations can lead to muscle fatigue or strain, which is not ideal during a warm-up. Thus, 10 seconds strikes a balance that is beneficial for preparing the muscles for physical activity.