target heart rate and fat burn

Wakara101
Wakara101 Posts: 8 Member
edited November 12 in Fitness and Exercise
so my coworker and I have this ongoing arguement over target heart rate and calorie burn. he says you only burn fat when doing 80% on the heart rate for cardio and i told him that i researched and it said in several sites that you burn fat when you are in your target heart rate zone. so i wanted to know who is right?
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