Track cyclist who specializes in sprint events, winning gold with Team Germany at the UEC European Track Championships four times from 2010 to 2014. He won his first Olympic medal at the 2012 Summer Olympics, where he took home bronze.
He hails from Greiz, Germany and competed in his first major race in 2004.
A photo of his thighs, which measured a circumference of 73 centimeters, went viral and led to many people referring to him as "Quadzilla."
He has been married and had a child in 2013.
He competed against gold medalist Chris Hoy at the 2012 Summer Olympics.