If you're a life-long exercise fanatic like me, you've probably hit that plateau, with every activity you've done. At the time of joining Amenzone, I had been trail-running for about a year, and just completed a couple of 12-mile runs around McDowell Mountain, with a 'whatever' attitude. So I started going to Amen's, and doing the variety of disciplines he and La Mar teach. Whether it be Boxing Training. or Primal, or the Saturday advanced class, they all include every muscle group, and they vary through the entire 50-minute session. Guaranteed-the first two weeks you will be sore, as you have just worked muscles you, normally don't use. But once those muscles come online, you are burning many more calories all day, every day, and the curriculum switches to you going beyond your limits...which are undefined for most.
This combo of extreme exercise, and mental conditioning are two elements that push your outside life to new levels as well.
Amen or La Mar always end the class with an inspirational talk, which is always about gaining a perspective on life, which is necessary, because doing their workout makes you a hardbody, and you now are pretty intimidating...in a great way.