The most impressive performance at a Toronto marathon Sunday was turned in by the man who came in last place - and is 100 years old. Fauja Singh completed the Scotiabank Toronto Waterfront Marathon in approximately eight hours, making him the oldest person ever to finish one of the 26.2-mile races. It was the eighth marathon for Singh, who was born India in 1911 and did not start running marathons until he was 89, after he moved to England following the death of his wife and son. He says not smoking or drinking alcohol throughout his life, combined with a vegetarian diet and up to 10 miles of walking or running per day are the secrets to his health. The Association of Road Racing Statistician already had Singh as the oldest person to complete a marathon, for one he ran seven years ago. But the Guinness Book of World Records recognized Dimitrion Yordanidis, 98, who ran in Athens in 1976. Singh recently set eight world records for his age group in one day at a special invitational meet in Toronto. He ran the 100 meters in 23.14, 200 meters in 52.23, the 400 meters in 2:13.48, the 800 meters in 5:32.18, the 1500 meters in 11:27.81, the mile in 11:53.45, the 3000 meters in 24:52.47 and the 5000 meters in 49:57.39. I have said it before: that I will carry on running, as it is keeping me alive," Singh told the marathon website.