Taking the stairs on a daily basis at an office is considered one of the most effective ways to burn calories in an easy way. Even though sometimes it's tempting to take the elevator - especially to the higher floors - you can feel more healthy in the long run, just by walking. According to some sources, a person burns 15 calories by taking 3 flights of stairs (based on a 68-75 kg person, 1 flight being 12 steps). For comparison, a slice of pizza (103g) is 272 cal., a can of coke (330ml) is 139 cal. 5 minutes of office stair climbing per day can make wonders. An awesome office team building collectable, which boosts your health significantly as well!