I slightly disagree. I find I have loads more energy to exercise since starting on Exante. I introduced exercise in the second week and have been doing circuits and lots of running and I don't really feel worse for it? I do eat some protein generally most days, either eggs/tuna/ham etc so maybe that helps? I too have done Insanity and love it. Like someone else mentioned though, I would definitely work up to that rather than start on it. Shred is an ideal build up to that? I guess you just need to listen to your body and not push it? x