noun - Clydesdale is a male athlete in the triathlon or road running community who weights 200 pounds (90.7 kg) or more, although it can vary from event to event. Its slang equivalent among open water swimmers is the beluga.
The Clydesdale division in the triathlon is for large male runners.
The female equivalent in the triathlon and road running communities is either a Filly or Athena. The International Triathlon Union (ITU) Technical Commission states that a Filly athlete must be at least 150 lbs. or 68 kg. Most races advertise the weight requirement for Fillies divisions on the race registration information. The Athena division, commonly called the Filly division, in running is for female runners who are over a certain weight which is not standardized. In some races, the minimum weight for an Athena division runner is 140 lbs. or 63.5 kg; other races require Athenas to be at least 150 lbs.