45 min HIIT, 64 ounces of water, hrv 54, os2 super low at 92%, readiness score 92. Day 70! Yesterday closed with a 45 min walk at lunch. With that os2, I'm going to have to do a second breathing treatment, maybe a third today. #75hardchallenge #75hard #fitnessjourney #fitover40 #livehard
5/9/2024, 2:27:06 PM