I've been working out every single day for about 5 years now, with the occasional break when I didn't have access to a gym, on holidays, or when I had to do double shifts at work. So far, my best workout has been Prime Mover, which I do daily, where ever I am, without any equipment. I used to hit the gym or run daily for one hour straight and thought I was in pretty decent shape. I was wrong. HIT or high-intensity training programs such as Prime Mover are the way to go if you want to see results and especially build and gain muscle mass instead of just trying to lose weight like I was focused on before. At almost 56, I am in the best physical shape of my life, and it is getting better as I progress through the last level of Prime Mover.