 And what I realized after 10 years of owning my strength and conditioning gym is we wouldn't do lots of circuit training with athletes because it might have too much of a recovery cost. If you're a professional MMA fighter, you don't want to destroy them on some big circuit. But when it came to the general population doing circuit training, what I've realized is we have incredibly low injury rates, if any, and the people that are doing the circuits become insanely fit. Both cardiorespiratory system and muscle endurance, they're increasing strength.