Madhupran Wolfgang Schwerk is an ultra-marathon runner, born 28 July 1955 and now living in Solingen, Germany. He was a trained retail-salesman, baritone opera singer, farmer, carpenter, and poultry breeder before becoming a house-husband in 1984. He has been married to opera singer Cornelia Berger-Schwerk since 1981 and they have one daughter. In the summer of 2006, he broke his own time of 42 days 13:24:03 set in 2002 with a new record of 41 days 08:16:29, averaging 75.111 miles per day. Schwerk is also ranked second all time at the 24-hour distance with 171.628 miles.