lean musle..

The Lean Mass-15 routine is a four-week plan that features a number of advanced training principles designed not just to build muscle, but increase cardio function and burn fat as well. that’s because, with its intense pacing and active rest periods, it’s partly a HIIT cardio routine—just one that also builds muscle.

Yeah, we said it. Eat more fat. “Fat doesn’t make you fat, too much food makes you fat,” says McComsey. Consuming more fat in your diet will actually help curb cravings after you’ve reduced your carb intake. “Fats help curb hunger because it takes the body longer to break down, use or store,” he says. Hormones also play a role, especially when it comes to muscle-supporting testosterone. McComsey adds, "fats are needed to create and balance out hormones in our body to function normally."

Want to get lean, hit the cardio machine. Wrong. “You will not make more muscle this route,” says McComsey. When you do cardio you're burning calories, but you're missing the muscle growth stimulation from weight training. "The more muscle that you have, the more calories and fat you'll be burning," he says. McComsey recommends hitting the weight room 3-4 days per week with one of the days being a circuit style with a variety of exercises. If you need to do cardio, try one day of 20-minutes of fast-slow intervals.