Drop 5 Pounds in a Week

Drink Mainly Water

A sports or energy drink, fruit smoothie, or light beer — each serving contains about 100 calories. Yet these beverages don’t satisfy you the way 100 calories of food does, so they’re a waste. Other liquids may be high in sodium and carbohydrates, which trick your body into retaining water, puffing you out.

Water, on the other hand, has zero calories and carbs and little to no sodium, making it the perfect slim-down drink. And strangely, it actually helps flush out excess water weight as well as jump-starts your metabolism. If it’s just too boring, add lemon wedges or mint leaves.

Ban White Bread and Pasta

Cutting out all white grain products — such as white rice, spaghetti, sandwich rolls — will instantly slim you down because the simple carbs in these foods cause bloating, especially around your belly. “Simple carbohydrates wreak havoc on your weight because they’re digested very quickly, leaving you hungry and more likely to overeat later,” says Jana Klauer, M.D., author of The Park Avenue Nutritionist’s Plan.

To go a step further, instead of replacing them with healthier yet still bloat-triggering whole-grain bread products, substitute vegetables for the week. This way, a chicken sandwich becomes chicken salad, and chips and dip turn into carrots and dip. The complex carbs from vegetables are digested more slowly, so you remain full longer. And because veggies are mostly water, they also help flush out excess water weight.

Do Cardio 30 Minutes a Day

Any workout that gets your heart rate up will burn calories. But you’ll use more calories if you pick a cardio routine that engages multiple muscles simultaneously, says Wendy Larkin, personal-training manager at Crunch’s Polk Street gym, in San Francisco.

Three to consider: spinning, cardio kickboxing, and boot-camp workouts. Half an hour of each torches 200 to 300 calories while toning up your arms, legs, and core so everything appears sleeker and tighter.

You’ll burn even more calories per session if your workout incorporates interval training: alternating short bursts of intense cardio with slower activity. Experts aren’t sure why it works, but trainers swear by it.

Drink Coffee an Hour Before Working Out

This is the one exception to the stick-to-water-only rule: Just as a coffee run makes your morning at work more productive, a pre-exercise cup of java with a splash of skim milk (about 11 calories) or black (just 5 calories) will energize your workout, explains Dr. Klauer. “You’ll burn more calories without realizing you’re pushing yourself harder.”

Have Nightly You-on-Top Sex

Not that you needed an excuse to hook up with your guy every night, but the fact is, this position is a fat blaster. Being on top means you do the rocking, and the more active you are, the more calories you burn — up to 144 for 30 minutes.

Sex also pumps levels of feel-good neurotransmitters, endorphins, helping you ride out food cravings. Get on top in reverse-cowgirl (i.e., facing away from your guy) to give your thigh and butt muscles an extra push.