Get started with using Training Zones for your running training or just make the process easier with this free running training zone calculator. Simply input a recent performance from a race or test and have your individualized Running Pace, Heart Rate, and Rate of Percieved Exertion (RPE) for not only your 6 Training Zones but also distances from 400m to a marathon. Get the most out of your training by using these Training Zones to structure your training. For best results, pair with an Endurance Strong Training Plan!