Exercise for Mental health We do lot a physical exercise for keeping body in shape and strong. I have not heard about any exercise for mental health. Is there any thing like mental exercise or physical exercise also include mental exercise ?
There is enough evidence to tackle the issue of exercise and depression. I am not sure about the rest of the psychiatric spectrum and disorders. A 2013 review by Cooney et al found differences in the methodological rigor of the trials. 


  For the 35 trials (1356 participants) comparing exercise with no treatment or a control intervention, the pooled SMD for the primary outcome of depression at the end of treatment was ‐0.62 (95% confidence interval (CI) ‐0.81 to ‐0.42), indicating a moderate clinical effect.


However, when they examined a smaller more methodologically rigorous group, the effect size lessened but was still significant. 


  6 trials (464 participants) with adequate allocation concealment, intention‐to‐treat analysis and blinded outcome assessment, the pooled SMD for this outcome was not statistically significant (‐0.18, 95% CI ‐0.47 to 0.11). Pooled data from the eight trials (377 participants) providing long‐term follow‐up data on mood found a small effect in favour of exercise (SMD ‐0.33, 95% CI ‐0.63 to ‐0.03). 


So yes, definitely exercise is very helpful for depression with meaningful improvements. 

Reference: 

Cooney  GM, Dwan  K, Greig  CA, Lawlor  DA, Rimer  J, Waugh  FR, McMurdo  M, Mead  GE. Exercise for depression. Cochrane Database of Systematic Reviews 2013, Issue 9. Art. No.: CD004366. DOI: 10.1002/14651858.CD004366.pub6.