
Originally Posted by
Phate
you're partially correct, he will burn more calories because of the greater energy output created by higher intensity, but at 160bpm he will start burning muscle if he is in a fasted state
the afterburn effect you are refering to won't come into effect much with steady state cardio, even at 160bpm, to get a good afterburn going you need to do interval training or HIIT that elevates you're heart and puts you in the 85-95% range for short periods with rest in between, though this is NOT recommended during fasting state as it puts you in a very anaerobic state