Final answer:
The best time for post-exercise recovery to replenish nutrients is within 30 minutes after exercise. This period is known as the anabolic window and is crucial for muscle repair and growth.
Therefore, option D is correct.
Step-by-step explanation:
The optimal window for post-exercise recovery to replenish nutrients lost during training begins within 30 minutes after exercise. This window, often referred to as the anabolic window, is a critical period during which the body is most receptive to nutrients like carbohydrates and proteins for recovery and muscle repair. Consuming these nutrients promptly after training can help to refuel energy stores, repair muscle tissues, and stimulate muscle growth.