I did some research and you can check out mine and calculate your own heart rates and exercise zones here. Your fat burning zone is lower than the other zones (mine is between 140 and 151 BPM). It may not exactly make sense to me, but it is what it is!
Yoga Inferno Level 2 (mostly beginner modification) Calorie Burn
- 34 minutes long
- 413 calories burned
- minimum heart rate 185 BPM (thus the only 8 sec. of fat burning!)
- maximum hear rate 205 BPM
I'll keep trying to figure out how to keep myself in that fat burning zone DURING a workout, but mostly I'm finding that my body burns the fat after workouts and while I'm at work (but I do work on my feet).