An anecdote: it was easy to train myself to go before I went on to yoga-like exercises (at home) which lasted more than an hour, although admittedly I was a teenager, one should have an instructor at hand at least in the beginning, one should shower after the exercises, and I did it 3-4 times a week.
However, it also (seemed to) improve sleep quality.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.