Didn't read all the responses but have you taken a break from exercise? Maybe your body is telling you to throttle back for a bit?
I live in an area that has a lot of terminally fit (extreme athletes) people that just break down because they never let up on exercise and let their body recoup.
I live in an area that has a lot of terminally fit (extreme athletes) people that just break down because they never let up on exercise and let their body recoup.