I went through this when I quit caffeine. I had been exercising nearly daily for two decades, loved almost every second of it, literally always caffeinated. The

I went through this when I quit caffeine. I had been exercising nearly daily for two decades, loved almost every second of it, literally always caffeinated. Then I quit caffeine for digestive reasons and my god it's like any form of exercise is pure torture. Finally starting to come through the other side, had to drastically simplify what I was doing to make it palatable (basically just running + yoga at this point.)