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5种有效的减肥方法

There are. . . a lot of popular diets out there.

So we thought we'd create a simple video investigating which ones are scientifically sound, and actually work.

From the outside it seems like a simple equation: Your weight is determined by the balance between the calories you take in, and the calories you burn.

By changing what you eat or your activity level, you can tip this equation towards weight gain or loss. Which brings us to our first category of diets:

Calorie Restriction. Companies like Weight Watchers claim you can eat whatever you want, as long as you stay below a prescribed number of daily calories.

Getting all your calories from junk food is technically allowed, but from a health perspective, it's important to think of the nutritional value of the foods too.

If you don't, you risk heart problems, nutrient deficiencies and chronic health issues.

Calorie Restriction with Optimal Nutrition or CRON diets, generally reduce their caloric intake by 20% while still meeting the daily nutritional requirements.

For example, instead of having a whole apple, a CRON dieter will just have the apple skin, which contains most of the nutrients.

If used properly (and not excessively), calorie restriction can be a safe and effective tool for weight loss.

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