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Endurance Lab

If you have one of our convenient Endurance Lab Training Plans, your custom training zones are auto-calculated directly within each workout. Otherwise, use this calculator to identify your individual intensity zones. For details on determining LTHR, TP, CV, and FTP and for the definition of each zone, please see Intensity Guidelines for Triathlon and Running. You don't need an Endurance Lab training plan or TrainingPeaks account to utilize the calculator. 

Running and Cycling Heart Rate

Run Pace

Cycling and Running Power

Swim Pace

Copyright © 2018 Endurance Lab. All rights reserved. The formulas and zones provided on this site, in electronic or written form, are subject to copyright and are provided for personal use only. Distribution, modification, replication or adaptation for commercial use without explicit consent is prohibited.

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