What does a "cool down" period after exercise help to prevent?

The "cool down" period after exercise is essential for gradually transitioning the body from a higher state of activity back to rest. This process aids in preventing muscle stiffness by allowing the muscles and joints to gradually relax and return to their normal state. During intense exercise, muscles contract and generate heat and lactic acid, which can contribute to stiffness if the body is suddenly stopped.

By engaging in light activity during a cool down, blood flow is maintained to the muscles, helping to clear out metabolic wastes and reducing the risk of tightness or soreness. This gradual decrease in activity supports recovery and prepares the body for future exercise sessions.

Other options, while relevant to overall exercise safety, relate to different physiological responses. For example, heat exhaustion typically requires more than a cool down to prevent, while cardiac arrest is better mitigated through understanding personal fitness levels and not over-exerting oneself. Dehydration is managed primarily through proper hydration practices before, during, and after exercise rather than through a cool down routine.