Interesting observations. I've seen Lyle McDonald comment on those same effects several times regarding low bodyfat and insulin resistance stating that it's a good thing from a survival standpoint. Getting really lean (as in contest or near contest lean) can cause muscles to be come insulin resistant in order to spare glucose for the brain.
there's certainly a fair bit of circulating cortisol as well. Interesting post.
And if you don't think kettleball squat cleans are difficult, I say, step up to the med-ball
- CJ Kim