The first couple of times just plain sucked. You'd be surprised how quickly your stamina builds though. I have a bad habit of not increasing the weight or intensity of my workout benefits level out after a certain point. I also didn't take days off. This is probably as bad as not exercising enough. Skipping a day when it comes to weight training has really helped. I've heard that about polyps. I could never do the full carnivore diet. There's no way that could be good for a person long-term.