Years ago I had a friend who suffered from severe anxiety, to the point where she later took a job working for an anxiety charity to help others.
I had some anxiety and followed all her advice for coping with it, got some counselling (really helped), read all the leaflets. Took up swimming. Meditated every day.
Recently, after some reading, I tried a different exercise routine for a few weeks, where I worked out every day before work.
Compared to all the other stuff I’d done, hitting the gym every day was _dramatically_ more effective for coping with stress and anxiety. I can’t really emphasise this enough. Like, not 2x or 3x as effective, but just off the charts. It felt physically impossible to get severely stressed if I hit the gym every morning.