The study authors believe that sleep deprivation can cause your body to produce extra hunger hormones (like ghrelin) and fewer satiety hormones (like leptin). This means you’ll feel hungrier and have a harder time controlling your cravings once they hit. Most adults should aim for at least 7 to 9 hours of shuteye per night, per the National Sleep Foundation’s recommendations.
In what is perhaps the biggest buzzkill of all time, sex doesn’t quite count as cardio or burn a significant amount of calories: Women burn about 3.6 per minute. "It’s still a good idea," Dr. Seltzer says, citing the activity’s other benefits, like increasing the output of the neurotransmitters serotonin and dopamine, which naturally reduce food cravings.
Remember, belly fat is not just troublesome because it makes you unhappy when you look in the mirror. The excess weight around your middle that increases with every passing year can raise your risk of type 2 diabetes, heart disease, dementia, and more. But if you're wondering what you can do to prevent that, these tricks to lose belly fat fast can help a lot.
If you're eating fewer than 1,200 calories per day, your workouts will suffer and the constant stress on your body can lead to muscle loss and slow your metabolism, as we reported in 10 Things You Don't Know About Calories. If you're trying to eat super healthy, you might be surprised at how few calories you're actually eating—try tracking your daily intake with a food tracking app and make sure you're fueling your body, not depriving it of nutrients.
7. Trick out your weight-loss plan with technology. For weight loss motivation, look no further than your pocket. Many smartphones have built-in pedometers that will measure the number of steps you take each day, Ziltzer says. Aim to log 10,000 steps a day. You can also find free apps and websites that will help you track the foods you eat and calculate your daily calorie intake.
Eat polyunsaturated fats. While saturated fat leads to the body's retention of visceral fat, causing abdominal girth and excessive weight gain, studies have shown that a diet high in polyunsaturated fat helps promote the production of muscle mass instead of body fat. Polyunsaturated fats can also help reduce cholesterol levels in the body, lowering the risk of stroke and heart disease. Sources of polyunsaturated fats include:
The most common mistake you're probably making when doing abs work is jumping in without limbering up, causing you to do most of the work with your hips and back. See, your core muscles are harder to activate when the areas surrounding it are still tense. Try this: Before doing a single crunch, put a foam roller in the center of your back at the edge of your shoulder blades and stretch back over the roller, arms up. Repeat until the middle part of your back, which tends to get pulled the most during improper abs work, feels loose.
Obese people who consumed a tablespoon or two of vinegar daily for eight weeks showed significant decreases in body fat—particularly visceral fat—according to a 2009 Japanese study. "One theory is that the acetic acid in the vinegar produces proteins that burn up fat," explains Pamela Peeke, M.D., professor of medicine at the University of Maryland, author of Fight Fat After 40.
Don’t let extra hours lounging in bed stand between you and a flatter belly. While getting enough sleep can help boost your metabolic rate, sleeping in may undo any benefit you’d enjoy from catching a few extra winks. One study reveals that late sleepers who snoozed past 10:45 in the morning ate nearly 250 more calories over the course of the day, despite eating half as many fruits and vegetables as their early bird counterparts. Even worse, they chowed down on more salty, sugary, and trans fat-laden fast food than those who woke up earlier. If you happen to head out of the house early, you’re in for an additional metabolic boost; researchers at Northwestern University have found that people exposed to just a short period of early morning sunlight had lower BMIs than their late-waking counterparts.