Okay, for my cardio, I do about 40 minute on the eliptical... I usually just set it at level 3 (I don't want a lot of resistance so I don't bulk up) and "run" at a speed that give me an intense work out. But, I'm wondering if I'm doing something wrong since I noticed that heart rate chart thingie shows that I'm doing "cardio" instead of "fat burning". Wtf does that mean?! When I purposely slowed down to a "fat burning" heart rate, it was like I was barely doing anything at all. Someone please explain the difference between these two things. My heart rate is usually 160-170 when I'm on the machine.



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