The short answer
A walk near trees will not treat depression, but it can be a low-cost way to interrupt a thought loop while getting movement.
Try this reset
Put your phone away and walk for 10 to 20 minutes somewhere with trees, water, sky or even a planted neighborhood street. Notice five things you see and three you hear.
Keep in mind
The small study behind this idea used 90-minute walks. Persistent rumination deserves real support, not pressure to “walk it off.”