He began competitive sports in the GDR. Growing up in the tower near Zwickau, he came in 1983 SC Karl- Marx-Stadt. He competed at the Junior World Championships in 1986 and at the European Championships in 1990 in Split, but did not reach on medals. With the end of the GDR his coach lost his job, and the trained concrete technicians Riedel worked on a construction site and hardly trained.
It was only when he met Karlheinz Steinmetz, a coach at USC Mainz, he continued his career as an athlete and was in the 1990s to one of the dominant sizes of German athletics. In addition to a victory at the Olympic Games in Atlanta in 1996 with 69,40 m Lars Riedel won five world titles in the discus. His best performance he scored on 3 May 1997 Wiesbaden with 71,50 m.
Riedel is 1,99 m tall and weighs 110 kg. He last competed for the natural gas LAC Chemnitz, however, transferred to 1 December 2006 Rhinehessen TuS 1897 Saulheim to re- attack in 2007 again. However, back problems prevented a comeback and a qualification for the 2008 Olympic Games. On 1 July 2008 he finished his career as an active athlete therefore. On the same day his autobiography was published.
During the World Athletics Championships in Berlin in 2009 Lars Riedel worked as an expert for the ARD. In March 2012, Riedel was seen in the fifth season of the RTL - dance show Let's Dance. There he occupied with his professional dance partner Marta Arndt the 5th Place. March 31, 2012 Riedel took part in the Celebrity Boxing ProSieben, in which he of Evil Jared by TKO was brought to its knees.
- Olympic champion in Atlanta 1996 (invalid - valid - 65,40 - 63.10 to 69.40 m - 69.24 )
- Silver medal at the Olympics Sydney 2000
- Five -time world champion (1991, 1993, 1995, 1997, 2001 )
- 3rd place at the 1999 World Championships in Seville
- European Champion 1998 in Budapest
- Eleven times German Champion
- Winners Golden Four 1996
- Five-time Grand Prix winner (1991, 1993, 1995, 1997, 1999 )
- European Cup winner (1993, 1995, 1997, 2000 and 2001 )