▁an ▁adj unct ▁treatment ▁for ▁m ild – mod er ate ▁de pression ▁and ▁mental ▁ill ness ▁in ▁general . ▁One ▁system atic ▁review ▁noted ▁that ▁y oga ▁may ▁be ▁effective ▁in ▁alle vi ating ▁sympt oms ▁of ▁pr en atal ▁de pression . ▁Another ▁review ▁assert ed ▁that ▁evidence ▁from ▁clin ical ▁tri als ▁supports ▁the ▁effic acy ▁of ▁physical ▁exercise ▁as ▁a ▁treatment ▁for ▁de pression ▁over ▁a ▁ 2 – 4   month ▁period . ▁ ▁A ▁ 2 0 1 5 ▁review ▁of ▁clin ical ▁evidence ▁which ▁included ▁a ▁medical ▁guid eline ▁for ▁the ▁treatment ▁of ▁de pression ▁with ▁exercise ▁noted ▁that ▁the ▁available ▁evidence ▁on ▁the ▁effect iveness ▁of ▁exercise ▁ther apy ▁for ▁de pression ▁suff ers ▁from ▁some ▁limitations ; ▁non eth eless , ▁it ▁stated ▁that ▁there ▁is ▁clear ▁evidence ▁of ▁effic acy ▁for ▁reducing ▁sympt oms ▁of ▁de pression . ▁The ▁review ▁also ▁noted ▁that ▁patient ▁characteristics , ▁the ▁type ▁of ▁de press ive ▁dis order , ▁and ▁the ▁nature ▁of ▁the ▁exercise ▁program ▁all ▁affect ▁the ▁ant ide press ant ▁properties ▁of ▁exercise ▁ther apy . ▁A ▁meta - analysis ▁from ▁July ▁ 2 0 1 6 ▁concluded ▁that ▁physical ▁exercise ▁impro ves ▁overall ▁quality ▁of ▁life ▁in ▁individuals ▁with ▁de pression ▁relative ▁to ▁controls . ▁ ▁Bra in ▁can cers ▁ ▁M ild ▁cogn itive ▁imp air ment ▁ ▁The ▁American ▁Academy ▁of ▁Ne uro log y ' s ▁January ▁ 2 0 1 8 ▁update ▁of ▁their ▁clin ical ▁practice ▁guid eline