Men who sit a lot may be at higher risk of heart failure: Men who sit for long periods of time outside of the workday and don’t frequently exercise appear to be at a much higher risk of heart failure, a condition in which the heart cannot pump enough blood to meet the body’s demands, according to a new study. Researchers tracked over 84,000 men with no history of heart failure. “Subjects who sat for at least five hours a day outside of their regular workday and had low levels of physical activity were twice as likely to have heart failure than men who sat for no more than two hours and were physically active.