Working out produces endorphin (your happy hormones). Happy people do not get depressed.
Working out makes your body work better and healthier. A body in tip top shape can handle stress a lot better.
Working out makes you feel better mentally.... "Yes, I got my workout in, I did it".... especially the days you don't feel like working out.
Only a few minutes per day will enhance the quality of your day. Just do it!!!
Be smart, stay healthy.