Power curve hacks from traveling abroad

So in Spring of this year I spent 20 days in Europe. When I got back to the USA, my body was totally different for 2 months. I completely mistook this for "having found good spots in the USA", but actually it was a delayed reaction to the Power Curve benefits gained from being OUTSIDE the USA. I am astonished at this realization and that it took me so many months to put the pieces of the puzzle…