General Adaptation Syndrome: how your body gets stronger

The General Adaptation Syndrome, also called the stress syndrome, explains the principle behind the stress response. Essential knowledge for trainers, because it tells us something important: training on its own does not create progress. It is going through all the phases in full that makes us adapt to a specific stressor. Stress always breaks you down, and it is the response to it, the recovery, that delivers the progress.

How the stress response works

A training stimulus like a squat triggers a response: your body starts "fighting" the external resistance. You hold that resistance as long as you can, until the resources you use for it run out. Your performance slowly drops until you are exhausted. That breakdown is a catabolic process, and it is exactly what triggers a response of building and recovery: an anabolic process. You cannot reach one without the other.

What you can use straight away in your training and programming

• Stress is not only training. The General Adaptation Syndrome applies to every stressor. A stressor is specific, but there is overlap, and so there is a limit to how much stress a body can handle without breaking itself down. Think of a burnout: training heavy, often and intense would be disastrous, because it does not support the recovery of an already exhausted body, even though the burnout comes from mental load.
• Programming is not about fatigue, it is about precision. You want to apply stress as specifically and as sparingly as possible to trigger adaptation. The demand for more should come from an athlete who is getting stronger and can handle more stress. Good trainers give the minimum to produce the maximum adaptation.
• This is why you have to overload progressively. To reach a next phase where you recover and hopefully reach supercompensation, you need to have been fatigued enough. The stronger and better conditioned you get, the more resistance you can offer against the stressor.
• More frequency can mean more adaptation, as long as you recover. Training more often means running through the stress response more often, which can lead to more adaptation. But then recovery has to be in order. Performance is your measuring stick: when it improves, sometimes moving a little faster or lifting 0.25 kg more, you know you have recovered enough and supercompensation has taken place.
• Excelling means applying as much targeted stress as possible. Stress that lines up directly with your athlete's goal (muscle growth, maximal strength). The more specific and minimalist, the more durable and linear the progression curve over time (linear over months and years, not day to day).