Heart Rate Variability or HRV is a measurement availble on most trackers and smart watches now. But what do the numbers mean and how can you use them?

For athletes they are the best monitor of whether you are under or over training?

For corporate warriors it is a geat indicator of whether you are in balance or whether you are pushing too hard.

Dr Lloyd Chapan is an execitive coach who has been using HRV for years to help clients manage their stress.