Better to induce relaxation with some of the alternatives suggested. Stress reactions are probably a combination of heredity and learned responses. Our personalities may be laid back or intense and over-reactive. We may have had childhood models that taught us effective ways of coping or ineffective and negative coping strategies. These behaviors can be modified or eliminated and replaced with more positive behavior, if we're willing to work at it.
Depression has more to do with feelings of helplessness, powerlessness, and an inability to act.
The person may lack positive feelings, cry for no reason or be unable to cry, and be unable to respond to humor. There may be little or no interest in other people or daily activity. Making even simple decisions may become difficult. Motivation may disappear, and the depressed individual may avoid or withdraw from daily activity. Sleep may become a problem, although the person may wish to escape through sleep.