The world's oldest competitive cyclist Robert Marchand has decided to retire at the age of 106. This decision comes a year after the French sportsman set a world record for the over-105s category. He completed about 22.5 kilometers in one hour. Marchand is no stranger to breaking records. Soon after his 100th birthday, he became the fastest cyclist of his age to cover 100 kilometers. And at 102, he peddled almost 27 kilometers in one hour.