During which phase of movement does follow through begin?

The correct choice identifies that follow-through begins after maximum shoulder internal rotation. During this phase, the athlete has completed the throwing motion, and their shoulder has moved through its range of motion to achieve maximum internal rotation. This stage sets the stage for follow-through as it allows the body to decelerate and stabilize after the forceful action of propulsion.

Follow-through is critical for several reasons, including injury prevention and maximizing the effectiveness of the movement. It provides an essential transition from the dynamic phase of the throw to a controlled state, ensuring that the athlete's body can absorb the forces generated during the movement.

In contrast, the other options represent different stages of the movement that either precede the follow-through or do not accurately indicate the beginning of this phase. For instance, maximum external rotation occurs just before the final internal rotation and does not initiate follow-through because it is still part of the acceleration phase. Ball release marks a key moment in the throw but does not encompass the subsequent culmination of motion that is characterized by follow-through. Similarly, the prior acceleration phase does not align with follow-through, as it is focused on generating speed and power rather than stabilizing and concluding the movement effectively.