What are the stages outlined in the GAS principle?

The General Adaptation Syndrome (GAS) principle, developed by Hans Selye, outlines a three-stage process that the body goes through in response to stress. The stages are Alarm, Resistance, and Exhaustion.

In the Alarm stage, the body recognizes a stressor and initiates a physiological response, which includes adrenaline release and increased heart rate. This is the body’s immediate reaction to a challenge, preparing it for a fight-or-flight response.

Following this is the Resistance stage, where the body starts to adapt to the stressor. During this phase, physiological systems work to restore balance, and the body may become more resilient to the stressor, allowing for improvements in performance or strength through regular training.

Finally, in the Exhaustion stage, if the stressor persists for too long without adequate recovery, the body’s resources become depleted. This can lead to decreased performance, fatigue, and increased risk of injury or illness.

Understanding these stages helps personal trainers recognize the importance of progression and recovery in training programs, ensuring that clients do not reach the exhaustion phase prematurely, which can hinder their long-term progress and overall health.