Borrowed from physics, the idea that all calories are created equal is gravely wrong when applied to biology. Calories from protein, carbs, and fat have very different effects on our hormones and ultimately our body composition. A new paradigm asserts the quality of calories you consume is key, but less has been said about the quality of various calorie-burning methods. Here, Tyler Hass explains why exercising with intensity has a more profound effect on body comp and overall health than steady-state cardio.