Events are held in all of the competitive strokes at varying distances depending on the age-group of the swimmer. Other additional events are also held that use these strokes.
A combination of the strokes swum by one swimmer in the order of butterfly, backstroke, breaststroke, and freestyle.
Four swimmers who all swim freestyle.
Four swimmers who each swim one of the competitive strokes in the order of backstroke, breaststroke, butterfly and freestyle.