#19 What Can You Learn From Your Heart?
Keeping track of your heart rate in training AND first thing in the morning, gives you a whole stream of data about your body that you can use not only to improve performance, but also quality of life. Make sure you aren't breaking any rules of training with heart rate though (looking at you, 4th cup of coffee person).
Tell firstname.lastname@example.org we sent you! Try it for yourself first-> shop.jakroo.com/Williams-Racing-Academy-2019