Which stage initiates fitness gains?

• A. Alarm stage
• B. Resistance stage
• C. Exhaustion stage
• D. Supercompensation

Answer: (A)

When a new or increased training stress is applied, the body first goes through the alarm phase. This immediate response involves hormonal and neural activation—adrenaline and cortisol rise, heart rate and respiration increase, and energy stores are mobilized—to ready the body to cope with the new demand. This initial reaction signals the body to begin the process of adaptation, laying the groundwork for improvements.

The actual fitness gains come during the subsequent resistance phase, where the body rebuilds and strengthens in response to the stimulus over adequate recovery. If stress continues without proper recovery, you can move toward exhaustion, where performance declines. The concept of supercompensation describes the post-recovery peak in performance, but it follows after the initiation of adaptation in the alarm stage.