When I received my P90+ machine I was using it 1x/day in the morning at level 10 then down to 8 for 3 weeks. Now, I’m consistently using my P90+ around 10a at level 10 down to 6, then again at around 7p at level 8 down to 3. After my morning session I do feel energized and my joints feel well oiled! In the evening I have a different result. I feel more relaxed and sleep through the night and my sleep is very restful (before P90+ I would have get up between 2-3x). After reading others comments, I’m going to try to start at level 20 and work my way down to see how that works for me.