On January 17, the first morning back from winter break, the Northern Michigan University football team conducted a fairly routine conditioning workout.After practice, starting right guard Anthony Herbert (Herbie to his NMU teammates) grabbed a quick breakfast and went back to his dorm, where he sat down to watch a movie. He was acting normally right up until his roommate saw him stop breathing. His roommate called 911 and started to perform CPR while emergency crews rushed to the scene. They arrived in less than ten minutes but were unable to resuscitate Herbert. He was 20 years old.An autopsy later revealed that Herbert had an enlarged heart, nearly twice the size of an average healthy adult's, from a condition called hypertrophic cardiomyopathy, or HCM, which causes ventricle walls to become thicker, potentially obstructing blood flow and leading to other complications. It's one of the leading causes of sudden cardiac arrest in young athletes.Continue reading on VICE Sports.