How to Slim Down at Any Age

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Your 40s

By age 40, you’ve lost up to 10 percent of your muscle mass—and, thus, may be burning about 100 fewer daily calories than you were 10 years ago. Plus, you’re approaching perimenopause (if you haven’t hit it already), which tends to spell trouble for your midsection. “This decade is when a lot of weight goes toward the abdomen, hips, and thighs,” White says. Here’s how to keep your dress size stable.

Next: Your 40s: Kick up workouts