<span>By performing different stretching exercises targeting multiple areas, one is able to realize long-term flexibility. The exercises depend on the various target muscles and the intensity of the exercises determines the outcome. Moreover multiple muscle exercise like swimming have been noted to improve on flexibility.</span>
Stretching and maintaining a healthy diet, however it depends on your genetics more unfortunately
90 degrees because you can increase the risk of a heat related illness.
Hope this is useful :D
I think it is called the resistance stage where there is unresolved stress and you feel normal