[frostfire]

I was rucking yesterday (70% humidity, 85degrees, sunny, flat terrain, sandy gravel track, 45lbs backpack, no LBE, steel-toe leather boots, jeans). After the first mile or two, I felt my face flushing like when you're smitten and blushed or when you o....you know. I did four miles total but the symptoms repeated a few more times near the end. I don't think I pushed myself too hard as I tried to ensure I was at a sustainable* pace for 12 miles.

Are these flushings the same symptoms as flushed skin in heat exhaustion/stroke?
(I assumed it was not because immediately afterwards and after a few sips of water, I could still skate 3 miles around the park, which after rucking it felt like flying)

*note:
I was trying to do what TR advised on attaining a 13min pace without running. The first mile, I walked, trying to do long strides and the arm swings. It was 14:48. Dissappointing. I ran (shuffle) the second mile and it was 13:08. I do realize that although I've shuffle-run the entire four miles before (don't laugh, indoor track, A/C) in 54min, running the entire 12 miles is not advisable. The last two miles, I both walked and shuffle-ran. 4 miles, 58:18, no rest/stop, which was bad. I also noticed that the shuffle-run took a tolll on the shoe sole. The heels're chipped pretty bad and I don't think it would have lasted with 12 miles.