You've heard it before, but it needs to be said again, as at least 70 percent of Americans aren't listening: "Staying up late may make you happy in the moment, but all that sleep you're skipping catches up to you in the form of extra fat around your middle," says Ilyse Schapiro, R.D., a certified nutritionist and co-author of Should I Scoop Out My Bagel? Yes, "me time" is important for your sanity, but "when you're lacking sleep, your body overproduces the appetite-stimulating hormone ghrelin, and under-produces leptin, which tells you when you're full." Getting proper shut-eye — the National Sleep Foundation says seven to nine hours is best, though it varies per person — truly stops unnecessary snacking when you wake up the next day.
You know you're supposed to eat more protein to lose weight, but you might not know exactly why. Well, it actually has to do with how your body handles insulin. "Your body starts to produce more insulin as you age, since your muscle and fat cells aren't responding to it properly," explains Louis Aronne, M.D., director of the obesity clinic at Cornell University.
High-intensity interval training is high on every trainer’s list, and for good reason. “My No.1 pick for fat loss would be high-intensity interval training, just because you’re burning a lot of calories in a short amount of time. You’re getting more bang for your buck. I know a lot of guys that don’t have all day to work out in a gym, so when it comes to belly fat you have to focus on calorie burn and intense workouts,” says Jim White, owner of Jim White Fitness and Nutrition Studios in Virginia Beach. Think bootcamps, tabata, and series of burpees, box jumps, and sprints—those all do the trick. The best thing about HIIT is that it keeps your body working long after you leave the gym, burning calories and fat on your off hours via a phenomenon called excess post-exercise oxygen consumption, aka EPOC.
“Belly fat or abdominal fat is the subcutaneous (which means under the skin) fat that sits around the waist and provides a store of energy, and also protection and heat, for the organs,” says Tarik Belalij, personal trainer and nutritionist at Everyone Active Becontree Leisure Centre. “Small amounts of fat below the skin is normal and healthy, it is the visceral fat, which surrounds the organs that can be the most dangerous type of fat – leading to heart attacks and diabetes.”