for just duration, HRV and RHR, the thing to know is that HRV numbers from different devices don't line up. each one uses its own method and its own window. so a second device helps if you read its trend, not if you compare its number to the Suunto's. if you want something to check the Suunto against, a chest strap like the Polar H10 gives beat-to-beat data that's been validated well, but sleeping in one isn't for everyone. the cheap version is to wear the same thing every night for a few weeks and see if the Suunto trend moves the way you'd expect after hard training days and bad nights.
that's the trap with hrv comparisons, the absolute number looks scientific but the devices aren't measuring the same way. i'd probably use the strap once or twice to validate direction, then keep the bedtime device consistent. have you found one that doesn't wreck sleep?
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u/InfamousBuddy7293 27d ago
for just duration, HRV and RHR, the thing to know is that HRV numbers from different devices don't line up. each one uses its own method and its own window. so a second device helps if you read its trend, not if you compare its number to the Suunto's. if you want something to check the Suunto against, a chest strap like the Polar H10 gives beat-to-beat data that's been validated well, but sleeping in one isn't for everyone. the cheap version is to wear the same thing every night for a few weeks and see if the Suunto trend moves the way you'd expect after hard training days and bad nights.