This article is a summary of the key points discussed by Joe Friel in his book 'Fast After 50'. If you have been training for several...

What is Heart Rate Variability (HRV)? HRV is the variation between heart beats. A high HRV score (more variation) indicates you are in a...

Common training metrics include heart rate, power, rate of perceived exertion, pace and speed. Training Peaks and your smart...