Exercise use to defeat stress. Human body is made to move. At the very least it is likely exercise reduces emotional discomfort. Exercise frees the mind from the stresses and strains of the day. It releases tension that built up, sometimes out of proportion. Going for exercise is as good and probably even better than having a rest. So when feeling anxious, better get out of the office and walk the tension away.
Exercise recharge the batteries after tension and stress have drained you of power and energy. It is as natural as breathing and it is the regular rhythmical action that drains away tension from our muscle and leaves us with a feeling of pleasant tiredness and calm, clear mind.
Exercise works because as we exercise, we become unconscious of our body and its movement, and we are just aware of the rhythm. We are born along in a total body-mind experience which make us whole.
That is why I will advise my patients whether they are suffering from psychological stress, neurotic disorder or even psychotic disorder to embark on exercise.