You've just lost weight, and you're left wondering where that part of you went. Fat burning is a complex chemical process that creates carbon dioxide and water, and, essentially, any fat you lose, you exhale away. A minor percentage of fat lost is in the form of water, through your urine, sweat, tears and feces.

At 46 years old, Ruth D. transformed her body by lifting weights and focusing on her fitness. She hits the gym four times a week.

The elliptical might just be the most used — and misused — piece of equipment at your gym. While the amount of calories you burn in any given elliptical workout depends on ramp height, resistance level and speed stride speed, you can burn usually burn about 270 to 400 calories in 30 minutes. And because your feet never leave the pedals, the elliptical provides a low-impact workout that is friendly to your joints and back, unlike a treadmill. But if your goal is to get your heart rate high, work up a sweat and keep off excess pounds but all you’re doing is a steady 20- or 30-minute workout, you’re missing out on the machine’s potential. “The elliptical is a powerhouse among cardio equipment because it allows you to use a large amount of muscle,” says Evan Johnson, a certified personal trainer in Storrs, CT.

A man gains weight by eating more calories than he burns daily. But don't just chow down on donuts and pizza. Eating healthy protein, dairy, whole grains and starchy vegetables will help you look and feel healthier when you need to put on pounds.

The high school years are full of transition for teens. Not only are they learning how to drive, manage school, make friends, and work, they are also growing in height and weight. Even at 16, both boys and girls are still experiencing growth sports -- some more than others.

Losing 10 kilograms takes time and dedication. A diet plan that trims your calorie intake, focuses on healthy foods, and includes regular physical activity is best.

While some cravings are purely about pleasure and comfort, others can point to a lack of nutrients or hormonal imbalance.

Ever since Robert De Niro piled on 60 pounds to play boxer Jake La Motta in 1980’s “Raging Bull,” Hollywood’s hottest talents have followed his lead, enduring extreme weight fluctuations for the sake of a plum role. Check out 12 celebrities who risked all this for their roles.

Sick of trying diets only to gain back the weight? Or perhaps you’re just not the diet type? Calorie-counting can be a drag, and the lifestyle changes required in a new healthy regimen might seem overwhelming. Here are several tips for getting fit with strategies informed by CBT.

One of the best ways to transform your body might be by competing on “Dancing with the Stars’ (at least in Hollywood). We look at the most transformative celebrity bodies thanks to Dancing with the Stars, from Amber Rose to Kelly Osbourne.

Being able to pinch an inch at your waistline may be upsetting to you. That pinchable fat is soft belly fat, also known as subcutaneous fat, acts as insulation and a source of energy for your body.

While there’s no question that consuming just 700 calories a day will promote weight loss, the amount of weight you’d lose in a week depends on how many calories your body requires to maintain itself.