So how does this work? A quick run-through: The first tip was to eat low carb. This is because a low-carb diet lowers your levels of the fat-storing hormone insulin, allowing your fat deposits to shrink and release their stored energy. This tends to cause you to want to consume fewer calories than you expend – without hunger – and lose weight. Several of the tips mentioned above are about fine-tuning your diet to better this effect.
Reducing alcohol intake can also help, says Fine. Alcohol contains about seven calories per gram—"just under fat, which equates to nine calories per gram.” And because alcohol is absorbed quickly, “when over-consumed, alcohol metabolism impairs metabolism of other macronutrients, such as carbs and fat, promoting…fat storage rather than breakdown,” she says.
The second concept I coined is called “diet confusion.” And I name it after the similar concept in weight lifting called muscle confusion. The idea behind diet confusion is, you have to keep your body off-kilter. So by changing the type of foods that you eat, the frequency of the foods that you eat, you can keep your metabolism revved up. Instead of eating the same food all the time and your body gets adjusted to that same food and your metabolism no longer is challenged. Those two principles are really the driving principles of Shred and why people are finding such success.
In a way, moderate-intensity physical activity is that "magic pill" a lot of people are looking for, because the health benefits go beyond keeping your waistline trim: Not only can it reduce your risk of cancer, stroke, diabetes and heart attacks, but studies have shown that physical activity can significantly improve the moods of patients with major depressive disorders.