The study first reviewed many prior studies with data points that took into consideration overall health, weight, amount of time standing and sitting as well as other factors. The average age of the participants was 33. Researchers found that standing burned 0.15 calories per minute more than sitting. By that math, standing for even a fraction of the day would lead to expending more calories per day. This is obviously assuming there is no additional calories being added to the person's diet. Just three hours standing would account for nearly three pounds a year.