General Adaptation Syndrome (GAS) is a three-stage process that describes the body's reaction to stress. It was first described by Hans Selye and includes the following stages:
1. Alarm Reaction: In this stage, the body detects the stressor and prepares for a fight-or-flight response. This involves the release of stress hormones such as adrenaline and cortisol, which increase heart rate, blood pressure, and energy levels.
2. Resistance: During this stage, the body attempts to adapt to the ongoing stressor. The initial fight-or-flight response subsides, but the body continues to function at a heightened state, trying to cope with the stressor. The body uses its resources to try and maintain normal functioning while managing the stress.
3. Exhaustion: If the stress continues for an extended period, the body's resources become depleted. The body can no longer sustain the heightened state of alertness, leading to physical and mental exhaustion. If this stage is not managed, it can result in burnout, illness, or other health problems.