I was wondering if the Recumbant Bike can be used as an alternative to the treadmill for HIIT. I have bad knees and when doing the treadmill they get inflamed, i have noticed that the bike works a lot better, but obviously my heart rate doesn't get near as high.
When i was doing HIIT (15min.) on the treadmill my heart rate was around 180-185, on the bike its around 160-165. What is the target heart range for burning bodyfat? I am 22yrs old, weigh 210-215lbs. Thanks