9 min read
Apple Watch HRV Training Readiness: How to Decide Today's Workout
Use Apple Watch HRV, resting heart rate, and sleep trends to choose hard, moderate, or recovery days with a practical evidence-aware framework.
Journal
Training, recovery, and Apple Health notes.
Product explainers, practical guides, and deeper reporting for Apple users who want a smarter workout tracker.
Need the right starting page first? Open the Gym Hero guide directory.
8 min read
How Gym Hero Calculates Your Sleep Score: An In-Depth Technical Exploration
Learn how Gym Hero uses your sleep data to calculate a comprehensive sleep score that helps you optimize recovery.
7 min read
VO₂max: The Ultimate Fitness Metric Explained
Discover why VO₂max is considered the gold standard for measuring cardiorespiratory fitness and how Gym Hero helps you track it.
10 min read
How to Track Progressive Overload on iPhone (Without Spreadsheet Chaos)
Use a practical, evidence-based system to track progressive overload on iPhone with Apple Health context and clear progression rules.
9 min read
How to Use HRV for Strength Training: A Practical Apple Health Guide
Learn a practical, evidence-aware framework for using HRV to adjust lifting intensity and volume with Apple Health context.