“The benefits were comparable to, and in some cases better than, more widely prescribed mental health treatments, including therapy and antidepressants. Importantly, we discovered who exercise helped most. Two groups showed the most improvement: adults aged 18 to 30 and women who had recently given birth.”
Article source: https://www.huffingtonpost.co.uk/entry/exercise-for-depression_uk_698f4336e4b0224cd9c7be45