Heart Rate

• What is Body Mass Index (BMI)?
• What does “Activity HR” mean, and what are the numbers at the bottom of the Heart Rate page in the App?
• In which way does the Heart Rate combine its reports with the Sports mode activity?
• Does the Heart Rate need to be calibrated?
• Can I share my Heart Rate result with someone else?
• How can I check past records of my Heart Rate?
• What does BPM means? What is the normal average Heart Rate?
• What is the Heart Rate feature, and what can I do with it?