From other threads I know some people have spent some time tracking HRV. I'm curious about other people's experiences. How do you track it? What have you learned? How have you benefitted? I'll start. I started years ago with iThlete as it was the only option I'd seen after reading about it in Maffetone's Big Book. I switched to Sweetbeat after listening to Ronda Collier interviewed a couple of times, and to have something closer to home (US) for support purposes. I measure first thing after waking, lying in bed. I have not always been consistent. I measure daily for weeks or months, but when not actively thinking about racing, I sometimes stop for awhile. Technical issues with equipment or batteries etc. sometimes stopped me as well. I've just gotten back to it. I waited a bit to let some lifestyle changes and issues settle down so I could reestablish a baseline. Compared to old readings, my new ones reflect improvement from those lifestyle changes. What I'm hoping to learn is how concurrent training affects me. (Meaning both strength and endurance) So far, combining Easy Strength and Easy Endurance (MAF) does not seem to interfere. I've had a little difficulty scheduling rest days, and HRV helps me see that. Maffetone writes that as aerobic fitness improves, HRV should also improve. What I've seen in the past is that if I'm coming down with something, HRV will plummet before symptoms arise. Also, sleep quality has a big impact. A late night will drop my HRV. What have others seen?