In the office, you might notice some colleagues frequently patting their legs or stretching their limbs. These simple movements can actually burn 200 to 300 calories. Want to try it too? Here are five easy exercises to help you.

Do sit-ups before getting out of bed. Simply pull your knees to your chest 25 to 50 times, and you can burn 20 calories in 5 minutes, while also improving blood circulation in your abdomen and back.
Dance while getting dressed. When you're getting ready in the morning, don't forget to gently sway your body; half an hour of swaying can burn 30 calories.
Stand. Don't sit when you can stand. You can burn up to 40% more calories. So stand, whether you're on the phone or chatting at a party.
Smile. Find some movies that make you laugh continuously and watch them every day. Not only will it lift your spirits, but if you laugh heartily for 10 to 15 minutes, you can burn 40 calories.
Walking, strolling, or jogging in the hallway. Making sure to do a little bit of activity throughout the day, such as taking the stairs instead of the elevator or running to the supermarket, can help you burn an extra 375 calories a day.