While chilling out can’t replace exercise, it can lead to a fat burn. Here’s how doing nothing helps you: As per Vanderbilt University Medical Centre, if you laugh for even 15 minutes a day, you will burn up to 40 calories. Sitting comfortably in your seat? Wiggle your toes and tap your feet. As per a study by Iowa State University, fidgeting around this way can help burn roughly 300 calories a day.