Strain Score is calculated using heart rate data captured throughout the day by your Apple Watch or HR sensor. This includes both active periods during tracked workouts and passive periods of daily activity, providing a comprehensive view of your body's exertion.
Workout Strain
Accumulated during tracked workouts, such as running, cycling, or gym sessions. It reflects the intensity and duration of structured exercise.
Passive Strain
Accumulated from non-workout activities, such as walking, household chores, or other daily movements. It accounts for your body’s exertion outside of recorded workouts.
Ranges
- Low (≤49 Strain): Strain at or below this level reflects lighter activity. While it can aid recovery, staying here consistently may hinder fitness progress. Strive to reach at least 50 Strain daily to stay on track.
- Normal (50–100 Strain): Falling within this range shows a balanced effort, combining enough exertion to improve fitness with manageable recovery. This is the ideal daily target for consistent progress and long-term gains.
- Peak (100 Strain): Exceeding 100 Strain indicates high-intensity effort that drives significant fitness gains. However, frequent efforts at this level require additional recovery to prevent overtraining and reduce the risk of injury.
Success Tip: Your goal is to reach 50 Strain daily, representing your average effort and the foundation for steady fitness progress. Days exceeding 100 Strain should be balanced with adequate recovery to optimize results.
Related content: For more detailed information on the Strain Score, refer to the Guide: Understanding Strain Score.