In order to complete a triathlon, athletes must swim for 1.5 km, bike for 40 km and then run for 10 km. It’s very gruelling. Canadian Simon Whitfield won the gold medal in the Men’s Triathlon at the 2000 Summer Olympics.
Further reading: Visit your local library and look for books with the Dewey Decimal number 796 for all the books about sports and the Olympics. Or, if you prefer something a little sillier, check out the book Swim Bark Run, which features a fictional “dog-athlon.”