Triathlon15 min
How to Plan Your Triathlon Season Like a Pro
A-B-C race hierarchy, periodization, work-life balance, recovery between events — the complete guide to structuring your triathlon year.
Read articleTraining Guides
Training tips, scientific guides, and expert advice for endurance athletes.
Science10 min
Pyramidal, Polarized, Threshold: Which Training Model?
Compare the 3 main intensity distribution models in endurance sports — and find out which one is backed by the most science.
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Guide8 min
Zone 2: Why It's the Foundation of Your Training
Discover why 80% of your training should be in Zone 2 and how to calculate your personalized Zone 2.
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Cycling6 min
How to Estimate Your FTP Without a Lab Test
3 simple methods to estimate your Functional Threshold Power with a smart trainer or outdoors.
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Science5 min
220 - Age: Why This Formula Is Wrong
The classic max HR formula is inaccurate. Discover more reliable scientific alternatives.
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Guide15 min
Beginner's Guide: How to Start Running the Right Way
Everything you need to know to start running safely: walk-run method, heart rate zones, injury prevention, gear guide, and the incredible benefits of running.
Read articlePut theory into practice
Use our free calculators to find your personal training zones for heart rate, pace, power, and more.