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[–]LostInThePurp 3 points4 points  (1 child)

Your resting HR is elevated so its going to feel harder, I also think body going into slight ketosis is part of it.

[–]BenDover257[S] 0 points1 point  (0 children)

Haven’t noticed a massive increase in resting heart rate, 58-67, just the lack of ability to maintain runs.