An ironman race is one of the toughest competitions in the world. Raced in under 12 hours, competitors must swim 4km, ride their bikes 180km, and finally run 42km. In 1978, fifteen men took up the challenge to finish this race in Kailua-Kona, Hawaii, and 12 of them did.  Today, you can't just fly to Hawaii and race. Competitors have to earn their place by winning their age group in races held around the world. Hiromu Inada was the only competitor in 85–89 year old age category. The second-oldest competitor to finish the race was nine years younger than him.