Peter Attia acknowledges that low HRV scores indicate a potential cost or reduced benefit from a workout, but he has not stopped exercising due to them.

“to be clear I don't think I have never once not exercised as a result of what that said and there have been days when I've had abysmal scores um and it's told me like my rate of what it my heart rate range on what it has told me is never above about 141 there have been days it's been as low as 121 which for me means like my recovery was 35 or 40% that's a night when I didn't sleep and something was dramatically off”