According to a recent study, standing all day may be worse for people's health than sitting. The study followed over 7,000 participants, half of them men and half women, and compared data from job types and medical histories over 12 years. At the end of the study, researchers found that 3.4 percent of the participants had developed heart disease. The likelihood of developing the disease was doubled For those who stood all day, the likelihood of developing the disease was doubled, as compared to those who sat or did work that involved a combination of standing and sitting.