In 2011, 20-year old Chris Staniforth died from a pulmonary embolism after playing video games the day before. Staniforth, who had recently been accepted to the game design program at Leicester University in England, spent more than ten hours a day playing the game Halo.

Unfortunately, deaths from pulmonary embolisms after sitting for long periods, like Staniforth’s, are rising. In fact, the U.S. Centers for Disease Control and Prevention estimates that 30 percent of people who develop a pulmonary embolism, caused when a deep vein thrombosis in the leg moves through the bloodstream and blocks oxygen to the lungs, will not survive.