My hand-wavy anectdata checks out with the author's. After a broken leg, I had a 2 year long sedentary period in which I gained 20 pounds. I burned it off usin

My hand-wavy anectdata checks out with the author's. After a broken leg, I had a 2 year long sedentary period in which I gained 20 pounds. I burned it off using HIIT and it took a little more than a month. I noticed results right away, and kept going until I was done. I ate according to my appetite. I don't get these kinds of results doing either regular endurance or strength training.