His Olympic gold medal performances in the 1992 (4 x 400m), 1996 (200m, 400m) and in 2000 ( 400m, 4 x 400m) gave him one of the longest careers of the modern long sprinters. That does even count his World Champs wins from 1991through 1999.
The video above was done at the SPIRE institute in April 2011. The MJ Performance institute is highly recommended. Michael has a great staff and there are only to MJ Performance centers in the world, one in Dallas, and the other, near Geneva, Ohio, at the SPIRE Institute!