Skip to main content
Check Order Status
Submit a request
Commonly Asked Questions
Why is the sum of my activity Strain lower than my Day Strain?
Why is my Strain 0?
What does ‘Optimal Training’ mean?
What is the difference between Hours of Sleep and Time in Bed?
What does the ‘Process Now’ button do?
What does ‘Optimal Sleep’ mean?
See all 8 articles
Activities & Auto-Detection
Why Didn't My Activity Auto-Detect?
Logging Activities & Sleep
Editing or Deleting an Activity
Strain & Calories
How can I increase the Strain of my workouts?
I’ve noticed a slight change in my calories, why?
How does WHOOP calculate calories burned?
Recovery & HRV
Cardiovascular Strain vs. Muscular Strain
Tracking Respiratory Rate
How can I improve my Recovery?
What is the Recovery calibration period?
What is Heart Rate Variability (HRV)?
See all 7 articles
Sleep Consistency and Sleep Stages
How is Tonight’s Sleep Need calculated?
How can I improve my Sleep Performance?
Establishing Optimal Signal Quality for Monitoring Heart Rate
What affects WHOOP accuracy?
How do I access my Weekly Performance Assessment?
What is the Weekly Performance Assessment (WPA)?
How do I use the Training State graph?
How do I use the Sleep Status graph?