 Zaseda was one of the organizers of the masters swimming movement in the Soviet Union, and competed himself since the first national championships in 1989.In total he won four national titles and set two national records in the 50 m (1989), 100 m (1990) and 200 m (1990, 1991) breaststroke events.He was one of the first journalists to report on the Chernobyl disaster.