Too little sleep or too much sleep can throw your stress and regulatory hormones out of whack, and may lead to weight gain. A single night of sleep deprivation can increase levels of ghrelin (a hormone that promotes hunger), making you more likely to overeat the next day. Reduced sleep may also lead to fatigue during the day (duh) and less physical activity, which may be another reason why people who regularly don't get enough sleep tend to gain weight.


Why it works: Burpees are a full-body workout that don’t require any equipment. You’re targeting multiple muscles as you work, which increases your overall energy expenditure. Plus, capping your workout with a HIIT sprint session will help you reap the benefits of an aerobic workout without having to go on a distance run. Ain’t nobody got time for that.
Science backs these ideas up when it comes shedding belly fat: In one study published in The Journal of Nutrition, researchers had overweight men and women follow a high-protein diet (30 percent protein, 40 percent carbs, and 30 percent fat) or a high-carb diet (15 percent protein, 55 percent carbs, and 30 percent fat). After one year of weight loss and maintenance, they found that the high-protein group experienced a 21 percent greater weight loss and 27 percent greater body fat loss on average than the high-carb group.
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But then I got sick and tired of being sick and tired, and since then, I’ve made it my life’s work to learn everything there is to know about how to lose belly fat fast. But nothing in my 20 years of health journalism has prepared me for the groundbreaking research that has emerged in just the last year—new science that shows exactly how we can turn off our fat genes and lose weight almost automatically.
Some of you are probably scratching your heads thinking “why is exercise at the bottom?” well it’s because it is not nearly as important as what you put in your mouth! Exercise is great for burning off a few calories (emphasis on a few), for toning up your body and overall health, but no matter how hard you work out, if you don’t have the diet aspect down you won’t be losing the weight as fast as you want… or at all. But it is still an important part of how to lose weight fast, and here’s why:
According to Ridge, beginners "have a tendency to overtrain by working out everyday with little to no rest." As good as their intention may be, their bodies simply aren't ready for this many workouts in a row. The result? "This mismanagement of rest can lead to getting sick or injured, and this will you put you out of the gym even longer than just putting in that one day of resting!"

For even more impressive effects on body composition: aim for exercise forms which elicit a positive hormonal response. This means lifting really heavy things (strength training), or interval training. Such exercise increases levels of the sex hormone testosterone (primarily in men) as well as growth hormone. Not only do greater levels of these hormones increase your muscle mass, but they also decrease your visceral fat (belly fat) in the long term.
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.
Plain and simple: We just don't feel full by liquid calories in quite the same way as we do real food. Drinking a juice or caramel coffee drink, for instance, won't make you feel full the way eating a bowl of veggie- and protein-packed stir-fry will. So monitor your intake of juice, soda, sweetened coffee and tea, and alcoholic beverages. If you consume each of those beverages during the day, you'll have taken in at least 800 extra calories by nighttime — and you'll still be hungry. (Incidentally, alcohol may suppress the metabolism of fat, making it tougher for you to burn those calories.) Some other ways to skip sugar? Check 'em out here.

You might have heard the term ‘middle-age spread’. This means, as women progress towards their middle years, the ratio of body fat increases compared to the body weight. During menopause, when the levels of estrogen go down, and the amount of androgens or male hormones increase, then there is an increased risk of fat accumulation in the waist. Hormones actually regulate the fat concentration in the body, and your figure depends entirely on it!


There’s a reason people are obsessed with apple cider vinegar for weight loss. Some research shows that it may have very modest weight loss benefits. For instance, in one 2009 study, researchers had 144 obese adults drink a placebo or 1 to 2 tablespoons of apple cider vinegar (ACV) daily for 3 months. They found that people who downed 2 tablespoons lost nearly 4 pounds, while those who sipped on 1 tablespoon dropped 2.5 pounds. The placebo drinkers? They actually experienced a small weight gain.
During your workout, it serves up a ridiculous amount of data, including a heart rate monitor that's rivaled only by Apple's latest Series 4 watch. Plus you can pair your favorite Bluetooth headphones and sync with a Spotify premium account to listen to downloaded playlists right from your watch. If you want to get up and go, phone free, you can do just that.
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