The key to this metabolism diet trick is to start slowly. First, add non-exercise movement to your day. Walk more often, take the stairs instead of the elevator, carry your groceries home from the store or add a few easy exercise sessions to your routine. Use an activity tracker to increase your daily step count and increase your total calories burned per day.
After attending culinary school, the actress invested in a bunch of fancy kitchen tools—but her all-time favorite tool is her Vitamix blender. “I use it every single day,” Kelly told PEOPLE at a Dove Chocolate event. “Every morning I make my smoothie. I actually used to go buy the smoothie I’m now able to make.” Inside her go-to drink, Kelly uses a vegetable-based protein powder, blueberries, ⅓ of a banana, crushed almonds and almond milk. “It feels very good making it myself,” she says.
Think about it: Say you're twice as active as an influencer you follow. Eat exactly what she eats, and you'll feel way more tired and way more hungry than she is, since your body likely requires more fuel to operate, Dr. Seltzer says. A more appropriate diet that's based on your specific energy needs may involve way more food—like two ice-cream scoops instead of one!—and give you way more energy so you can live your best life, hanger-free.
"The main culprit that slows metabolism and often leads to yo-yo dieting is what I call shrinking muscle syndrome," says Caroline Apovian, MD, director of the Nutrition and Weight Management Center at Boston Medical Center and the author of The Overnight Diet: The Proven Plan for Fast and Permanent Weight Loss. Starting at age 30, most people begin to lose about half a pound of the metabolism-revving tissue each year. Poof! Gone, just like that. And at age 50, the rate doubles. "The average sedentary woman may have lost nearly 15 pounds of muscle by the time she reaches her late 50s, a change that could cause her to gain nearly the same amount in body fat," says Wayne Westcott, PhD, a Prevention advisory board member and the director of fitness research at Quincy College in Massachusetts.