I'm a 29 year old male, 5'7", 155lbs, and in a one-hour workout, my MyZone chest strap monitor (http://myzone.org, what my gym uses) tells me I burn ~800-1000calories. E.g., a couple weeks ago I worked out for 69 minutes, average heart rate was 144bpm and peak heart rate was 184bpm. MyZone said I burned 904calories. I just did some indoor cycling at home for 47 minutes and my Apple Watch said I had an average heart rate of 141bpm, 98 active calories, 76 resting calories, for a total of 174 calories burned Does MyZone just juke the calories burned numbers to be high? Or is the Apple Watch under calculating calories burned? Thanks!