Check out this infographic which discusses the dangers of prolonged sitting. Many jobs involve sitting all day, and for people who have these types of jobs, it is very important for them to interrupt these long hours of sitting, even if it is for just a few minutes. You will be more productive with your work if you take a few minutes each hour to move around. Get up and stretch, go for a brisk walk, walk up and down some stairs, do a few push ups; anything to interrupt your day full of sitting. Then when you are home at night, try to limit how much you are sitting there. Put exercise in your day where ever you can. Hold a plank during commercial breaks as you watch TV, walk to work, take the stairs instead of the elevator, and park at the back of the parking lot. Every exercise you do throughout your day will add up!