Triathlon Training Knowledge Hub

Your comprehensive guide to the science of smart, adaptive triathlon training. Learn the principles that power elite performance.

Written by Jelle Dekker, founder of Theron · Last updated: August 2026

The Ultimate Guide to Smart Triathlon Training

Start here with our comprehensive pillar guide covering all aspects of modern triathlon training: from the science of adaptation and periodization to training load management, recovery, and injury prevention. This is your foundation for understanding how to train smarter.

Read the Complete Guide →

Deep Dive Guides

A Deep Dive into Triathlon Periodization

Learn how to structure your training season with macrocycles, mesocycles, and microcycles. Complete breakdown for Sprint, Olympic, Half-Ironman, and Full-Ironman distances.

Read Guide →

Mastering Training Load

Understand TSS, CTL, ATL, and the Performance Management Chart. Learn how to quantify and manage your training load effectively.

Read Guide →

The Triathlete's Guide to Strength Training

Discover why strength training is a mandatory fourth discipline. Learn how to integrate it effectively with periodized plans.

Read Guide →

Brick Workouts Explained

Master the bike-to-run transition with race-specific brick workouts. Learn the science behind "jelly legs" and how to overcome it.

Read Guide →

Heart Rate Variability (HRV)

Your secret weapon for recovery. Learn how to measure, interpret, and use HRV data to optimize your training readiness.

Read Guide →

Injury Prevention with ACWR

Learn how the Acute:Chronic Workload Ratio predicts and prevents overuse injuries. Replace guesswork with data-driven training.

Read Guide →

Polarized vs. Pyramidal Training

Compare the two dominant training intensity models. Learn which approach is best for your race distance and training phase.

Read Guide →

The Science of the Taper

Master the art of peaking perfectly. Learn the four golden rules of tapering and how to execute a scientifically-backed taper.

Read Guide →

Nutrition and Sleep

The twin pillars of recovery. Learn the science of post-workout nutrition and how sleep drives athletic adaptation.

Read Guide →

How Theron's AI Coach Works

Go behind the scenes to see how Theron translates sports science into personalized, adaptive training plans that adjust daily.

Read Guide →

Download Theron

Scan this QR code with your iPhone to download Theron from the App Store

App Store QR Code Or open in browser