"Hearst Magazines and AOL may earn commission or revenue on some items through these links." If your workday is spent parked in a desk chair, you're not alone. According to research published in the American Journal of Preventive Cardiology, more than 80% of jobs in the U.S. are mostly sedentary. Prolonged sitting has been linked to serious concerns, including heart disease, diabetes, and stroke. But being desk-bound doesn't mean you can't get in some activity.