HRV is a highly volatile metric that constantly changes based on external influences. That’s why it only makes sense to measure it for analytical purposes in a controlled environment with minimal distractions and a heart rate that is close to your resting heart rate. That’s why WHOOP measures...
Chawla and his team analyzed data collected via Fitbit from 557 college students over the course of four years. They recorded 255,736 sleep sessions—measuring bedtimes, sleep and restingheartrate. Significant increases in RHR were observed when individuals went to bed anywhere between one and 30...
If participants already have an active Fitbit account, they will be allowed to use this account. We will strongly encourage the use of the provided Fitbit device. If this is not workable for participants and they feel they need to use their personal device for any reason, this will be ...