HRV training
Concept
Used with a Polar strap to measure readiness score, with results being surprisingly accurate in reflecting stress and nervous system activity.
Mentioned in 2 videos
Videos Mentioning HRV training

Tim Ferriss — My Healing Journey After Childhood Abuse
Tim Ferriss
A training method involving tracking heart rate and respiration using feedback devices, found surprisingly effective by Tim Ferriss for down-regulating physiology and changing psychology, and managing hyper-reactivity to stress.

A typical Blueprint morning / Nov 2021
Bryan Johnson
Used with a Polar strap to measure readiness score, with results being surprisingly accurate in reflecting stress and nervous system activity.