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> Start with brisk walking three times a week for 20-30 minutes at an intensity where you can still talk.

When people talk about exercise as a treatment for depression, i never imagined they meant such small amounts.

You have to start somewhere. A full on daily HIIT routine for someone who's struggling to get out of bed is not going to help them much (setting aside risk of injury, they're going to be frustrated and that will set them back too).

I understand that, but regardless there is presumably an exercise amount threshold you need to clear in order to get the anti-depression effects.

And yet even that little exercise produces significant differences in outcome compared to doing less.

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