You don’t have to be the next Usain Bolt in the making to enjoy some serious belly-slimming results from hitting the track from time to time. Even a moderate-rate jog a few times a week can blast through that belly fat; in fact, a study conducted at Duke University Medical Center found that, over the course of an eight-month study, overweight adult study subjects who jogged 12 miles a week lost the most belly fat and burned 67 percent more calories than participants who did an equivalent amount of resistance exercise, or a combination of cardio and resistance work.
Once your muscle glycogen stores are full, they’ll remain this way for days, as long as no other strength training is performed (because muscle glycogen is burned only during high- intensity exercise). Carbing up on Wednesday also gives you time to make adjustments. If you feel you look flat and small on Thursday or Friday, increase your carbs a bit. Bloated and soft? Cut them back a bit. Make adjustments by 25–50 grams at a time.
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.