They are known as Stage 1 and Stage 2 respectively. In practice, these stages are not always clear cut, as in real life the two stages can and do overlap. First of all, let's look at stress and two different categories of stress. Stress is an individual reaction. Of several people dealing with the same set of circumstances, one might succumb to stress and the others remain unaffected.
Stress is misunderstood.
It can be beneficial or it can ruin a life. Outstanding athletic achievements are not made during training but when the stress of competition provides the added stress, the edge that makes an athlete give just that little bit more. Harmful stress is also called 'negative stress'. This is for the very practical reason that stress can be positive, and indeed is very necessary in our lives. Because stress is very much an individual response, you might be wondering at this point how anyone is expected to arrive at an understanding of the subject.