If you are serious about fitness, health, and performance, then Heart Rate Training, Second Edition, is for you. With a myriad of affordable smartphone apps and wearable devices enabling you to track your bodys response to activity, its never been easier to use heart rate monitoring to customize your trainingand this guide will show you how! In Heart Rate Training, Second Edition, authors Roy Benson and Declan Connolly combine decades of coaching experience, scientific research, and practical knowledge to help you understand the best way to make your heart rate monitor work for you. They will show you how to get reliable data from your device, dispel myths surrounding heart rate monitors, and make it easy for you to calculate your ideal target heart rate. Then youll learn how to customize your training by varying the intensity, duration, frequency, and mode of your exercise sessions as you work toward improving endurance, stamina, economy, and speed. Information on heart rate va