Garmin & Fitbit both track & categorize the amount of minutes you spend in HR zones 2-5 to count towards the AHA recommendation of 150 minutes of exercise a week. Typically zones 2 & 3 give you 1 minute of credit & zones 4 & 5 give you 2 minutes of credit for every minute. Is it possible to add this feature as no one does it for the Apple Watch. Thank you