I feel like HRV is such a cornerstone of WHOOP… I was surprised to see it not included in the score.
HRV is super personal and heavily influenced by genetics, which makes it tough to use for global comparisons. Healthspan is built to measure how you stack up against broader health standards, so instead of HRV, it leans on Resting Heart Rate—which still reflects similar info, but is easier to compare across different people.