Hiroshi Hoketsu, who will represent Japan in the equestrian discipline of dressage at the age of 71, told Yahoo! Sports how chasing a slice of history and becoming the oldest Olympian in the last 92 years is the result of a fanatical commitment to the sport.
Hoketsu will take part in his third Olympics, 48 years after making his debut and finishing 40th as a show jumper on home soil at the 1964 Tokyo Games. Despite continuing to rise at 5 a.m. every day to ride horses, he quit competing and became a successful international businessman for pharmaceutical companies.
I found this on Yahoo news and just coulnd not help but to pass it on to you!