You may want to sit down for this.... I am doing Crossfit. I've never been much for the gym or strenuous exercise but I think I like this. I've been three times. Surprisingly I was able to do sit-ups using an abmat. I wish I had know about these sooner. My lower back doesn't even pop like it used to when I use this. I had a couple of days walking funny from doing more squats than I have done in my entire life. The workouts are scaled down for beginners like me but they are still very intense. I will try to keep posting about my progress. I can't believe I'm doing a Sumo Deadlift High Pull!