‘Weight Training May Help to Ease or Prevent Depression – Benefits essentially were the same whether people went to the gym twice a week or five times a week.’
https://mobile.nytimes.com/2018/06/06/well/weight-training-may-help-to-ease-or-prevent-depression.html
“Lifting weights might also lift moods, according to an important new review of dozens of studies about strength training and depression. It finds that resistance exercise often substantially reduces people’s gloom, no matter how melancholy they feel at first, or how often — or seldom — they actually get to the gym and lift.
There already is considerable evidence that exercise, in general, can help to both stave off and treat depression. A large-scale 2016 review that involved more than a million people, for instance, concluded that being physically fit substantially reduces the risk that someone will develop clinical depression. Other studies and reviews have found that exercise also can reduce symptoms of depression in people who have been given diagnoses of the condition.”