The Coach Blog
Training science, AI coaching insights, and practical guides to help you train smarter.
Training After Injury: The Recovery Playbook for Endurance Athletes
How to keep your fitness, load injured tissue safely, and return to running after a musculoskeletal injury. Evidence-based rehab for recreational endurance athletes.
Apple Health Sync Is Live: AI Coaching From Your Apple Watch
Coach now syncs with Apple Health: workouts, heart rate, HRV, and sleep from your Apple Watch feed your AI coaching, with up to a year of history backfilled.
Heat Training for Endurance: The Science of Acclimation, Cooling, and Getting Faster
How heat hurts endurance performance, why heat acclimation is the most underrated training tool, and the protocols, cooling tactics, and safety rules that actually work.
The Modern Carbohydrate Playbook: How to Fuel Endurance in 2026
Evidence-based carbohydrate fueling for endurance: carbs per hour, glucose-fructose ratios, gut training, race-day protocols, and recovery.
Overtraining Syndrome: The Science of Burnout and How to Avoid It
Understand the overtraining continuum from functional overreaching to full burnout. Learn the warning signs, biomarkers, and evidence-based prevention strategies.
Training for Ironman with an AI Coach: Managing Three Sports With One Platform
How AI coaching handles the unique challenges of Ironman and triathlon training — balancing swim, bike, and run volume, managing combined training load, and adapting when life disrupts the plan.
Coach vs ChatGPT for Fitness: Why a Purpose-Built AI Coach Beats a General Chatbot
Compare using ChatGPT for workout plans vs a purpose-built AI fitness coach. Data integration, training memory, and periodization compared honestly.
Coach vs Garmin Coach: Which AI Coach Gets More From Your Garmin Data?
Compare Garmin Coach and Coach for training guidance. See how a free built-in coach stacks up against a conversational AI with deep data integration.
Coach vs Runna: Comparing AI Running Coaches in 2026
Detailed comparison of Coach and Runna for AI-powered running coaching. Features, pricing, flexibility, and data integration compared side by side.
TRIMP Explained: Meaning, Formula (Banister and Edwards), and How to Use Training Load
What TRIMP (training impulse) means, how the Banister and Edwards formulas calculate it, how it compares to TSS, CTL, ATL, and TSB, and how to read training load without overtraining.
Recovery Tracking for Athletes: Sleep, HRV, and Data-Driven Rest Days
Learn how athlete recovery tracking with HRV, sleep quality, and readiness metrics can optimize your training. Make rest days data-driven, not guesswork.
Nutrition for Endurance Athletes: A Practical Fueling Guide
A complete nutrition guide for runners and endurance athletes covering macros, pre/during/post-workout fueling, hydration, and supplements.
Training Periodization for Runners: Build, Peak, Race, Recover
Learn how training periodization structures your running into base, build, peak, taper, and recovery phases for optimal race-day performance.
Garmin Meets AI Coaching: How Wearable Data Transforms Your Training
How connecting your Garmin watch to an AI coach turns HRV, sleep, and training load data into specific decisions about what to train tomorrow.
Heart Rate Zone Training: The Complete Guide to Training by Heart Rate
Master heart rate zone training with this guide to all 5 HR zones, zone 2 endurance benefits, calculating zones, and using data to train smarter.
AI Coach vs Human Coach: An Honest Verdict for Endurance Athletes
AI coaching versus an expert human coach or personal trainer, judged on the research: where LLMs win, where they fail, what each costs, and how to use one without getting hurt.
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