One hour HIIT, and then most people are bragging. High-intensity intermittent exercise, generally designed three high-intensity peaks, only takes about 20 minutes. It can be done in an hour. Non-professional athletes are just aerobic exercises with different intensities.
Then look at the heart rate at this time. Exercise with high heart rate consumes more calories.
In fact, if you design aerobic fat-reducing exercise and HIIT exercise, the latter is definitely more efficient.