=> Initially the students enters the alarm phase, which prepares his body for fight or flight - when for instance he/she freezes or his/her breathing rate increases.
=> The student then transitions into the resistance phase and starts to perform the required procedures. The aim of this phase is to reduce the level of stress.
=> Finally, the body is busy eliminating the products of the previous phases such as stress hormones and the student will most likely feel tired, even exhausted. This is what the student will be experiencing during the debriefing.

GENERAL ADAPTATION SYNDROME (GAS)

The biological reaction to stress, which the organism is mobilized by is the General Adaptation Syndrome, where adaptation means the tendency of the body to fight to restore homeostasis against forces that upset the body’s natural balance. There are three stages: alarm, resistance, and exhaustion.

• Alarm – The alarm reaction stage refers to the initial symptoms the body experiences when under stress. You may be familiar with the “fight-or-flight” response, which is a physiological response to stress. This natural reaction prepares you to either flee or protect yourself in dangerous situations. Stress hormones (adrenalin) will cause a massive release of glucose into the blood, and an acceleration of pulse and blood pressure and an increase in the rate and depth of breathing. However, no specific organ is affected.
• Resistance – The stress response is channeled into the specific organ system or process most capable of dealing with or suppressing it. During this stage, a different stress hormone cortisol (cortisone) is released which assists the body to quickly convert fats to sugar to prolong the mobilization of energy in the body. If an individual is exposed to stress for too long, his/her energy resources become depleted.
• Exhaustion – This stage is the result of prolonged or chronic stress. The organs or process dealing with the stressor break down and we return to the generalized format of the alarm phase. This needs time to get rid of the waste products created by the above processes.