you could argue that sleep is one of the biggest components of recovery.
I wouldn't argue that it's one of the biggest components of recovery.
It is THE BIGGEST component of recovery. Sleep outstrips all that voodoo sports scimarketing by orders of magnitude.
As a sleep tracker, evidence suggests that things like Whoop, Beddit, etc work, but HRV for recovery in athletes, not so much.
https://www.uphillathlete.com/why-we-stopped-relying-on-hrv-apps/
Also at £25/month? Hard pass.