Guides

Guides

Plain-language explanations of how training load works and what the metrics in 42Runs actually show.

• Training load

  Fitness, Fatigue, and Form: What They Mean and How to Read Them

  What the three numbers measure, how they relate to each other, and how to read negative or positive Form.

• Training zones

  Running Training Zones Explained: Pace, Heart Rate, and Perceived Effort

  The seven zones, three ways to target them, what threshold means, and how to find yours.

• Training abilities

  The Six Running Abilities: What Each Workout Is Actually Training

  The three basic and three advanced abilities behind every workout, and why a plan changes emphasis over time.

• Watch & sync

  How to Connect Your Watch to 42Runs

  Garmin, Suunto, Coros, or Amazfit: how the pairing service connects, what syncs, and what to do if it doesn't.

• Watch & sync

  How to Connect Apple Watch to 42Runs

  Connect on iPhone with Health permission: planned workouts go to the watch, completed runs come back. No extra account.

• Watch & sync

  How to Connect Polar to 42Runs

  Sign in with Polar Flow in the iPhone or Android app. Polar can pull data today; planned workouts cannot be sent yet.

• For coaches

  What a Coach Can See: Performance Metrics and Charts in 42Runs

  Every performance metric a coach has for a connected athlete, what each one shows, and how it can be used.