Your skinnier friends are probably fidgeters, who burn up to 350 calories a day just by tapping their feet or being restless.

Try it for a few days. Walk around while you’re on the phone, or tap out a tune with your hands or feet (in the privacy of your own office, of course).

In fact, do a couple of swaps a day and you can drop 10 pounds in 5 weeks! So try these 25 easy tweaks—and get the slim body you want in no time.

RELATED: Cutting Just 300 Calories a Day Can Improve Your Health, Study Finds