*Herman de Vries has explored the relationship between [[HRV (Heart Rate Variability)|HRV]], [[Sleep tracking|sleep]] and [[Activity tracking|physical activity]] [https://hermandevries.nl/2020/09/23/relationships-between-hrv-sleep-and-physical-activity-in-personal-data/ by using an Oura Ring] | *Herman de Vries has explored the relationship between [[HRV (Heart Rate Variability)|HRV]], [[Sleep tracking|sleep]] and [[Activity tracking|physical activity]] [https://hermandevries.nl/2020/09/23/relationships-between-hrv-sleep-and-physical-activity-in-personal-data/ by using an Oura Ring] |