I’ve used the Whoop 5.0 for two months now, and the HR data is consistently inaccurate — usually 10–20 bpm below my actual heart rate during workouts. I do a lot of strength training, HIIT, intervals and every session, Whoop underreports my HR.
I’ve compared it against my Garmin Fenix 8 (with and without a chest strap), and the difference is obvious — I know when my HR is at 160, not 140. Even the Fenix 8 wrist sensor is surprisingly accurate, while Whoop is completely off during anything intense.
This is a 2025 device. How can it still have hardware so bad it can’t handle its core function? If the HR data is wrong, the insights are worthless. I even tried the bicep strap — it’s fine for steady running, but useless again for HIIT or gym workouts.
How is this still a thing? They need to fix this ASAP!