Mah, described as "an ordinary runner of ordinary speed", did not begin running marathons until he was 40. He reportedly took up the sport to prevent heart disease that ran in his family. In 1964, he formed the Metro TorontoFitness Club with three others, and later started the North York Track Club where he coached Maureen Wilton. That club was considered one of the best in North America and Wilton was one of its star athletes. Mah and the 13-year-old Wilton both ran their debut marathons on May 6, 1967 at York University in Toronto, Ontario. Wilton ran the first three laps of the five lap course with Mah and she went on to finish in a time of 3:15:23, a performance recognized as a world best by the International Association of Athletics Federations. Invited by Mah, Kathrine Switzer also ran that day – only sixteen days after her historic run at the Boston Marathon. Mah ran the Glass City Marathon in Toledo, Ohio numerous times, his first at the inaugural event in 1971. By 1977, he completed his 100th marathon there with a 3:18:18 performance. Three years at the same race, his tenth on the Glass City course, Mah posted his 173rd. In 1981, Mah ran his 198th marathon to break the record for most marathons set by Ted Corbitt. When possible, race directors would issue bib numbers to match his marathon total. He would later run his 300th in Detroit, his 400th in Virginia, and his 500th in Boston. The 1984 New York City Marathon was Mah's 348th marathon and 35th of the year. At least one race director scheduled back-to-back marathons on Saturday and Sunday to help him add to his totals. Mah ran the Boston Marathon twenty times and was a regular participant in ultramarathons and triathlons as well as cross country skiing and canoe races. In recognition of his role in promoting the sport of distance running, he was invited to participate in the 152-mile Spartathlon in Greece. Although he did not finish the event, he was publicly honored by the Greeks for "his love of competition". Mah's personal best over the marathon distance was 3:13, however, he felt he could go faster if determined to do so. Hal Higdon commented that he believed Mah was capable of running a marathon under three hours if he trained for a specific race. Mah's last race was a 50 kilometer event Labour Day weekend, 1988, in St. Jacobs, Ontario; he dropped out of the Toronto Marathon three weeks later. Mah's record would last until 1994 when broken by Norm Frank of Rochester, New York.
Death and legacy
Following a lingering bout of hepatitis, Mah died of leukemia at the St. Vincent Mercy Medical Center in Toledo, Ohio in 1988. Following his death, he was a subject of a case report that appeared in the May 1991 issue of the medical journalChest. According to that report, Mah received a cardiac stress test nine months prior to his death which found "ischemia with disseminated circadian variation suggesting possible without angina." Autopsy revealed localized fibrosis of the left papillary muscles, but no evidence of coronary atherosclerosis. Mah has been described as "an early leader of the modern running boom". Joe Henderson wrote an editorial in tribute to Mah in 1989. According to Henderson, Mah stated: "I believe Americans have been brainwashed with the idea that they must do less because increased age will result in less energy and diminished capacity. I have found this is simply not true if a person does not allow his mind to accept the traditional view of aging." Along with Dick Beardsley, Herb Lorenz, and Harold Tinsley, Mah was a 1989 inductee of the Road Runners Club of America's Hall of Fame. The Sy Mah Memorial Scholarship at the University of Toledo was established in 1990 by Mah's friend and family. In addition to meeting various academic standards, qualified recipients within the College of Health Science and Human Service are required to be "avid social runners". A portion of the proceeds from the annual Glass City Marathon go to fund this award. Participants in that race pass by a life-size statue of Mah that was dedicated September 13, 2002 in Olander Park in Sylvania, Ohio. The statue was created by Thomas Lingeman, a Professor of Art at the University of Toledo, who was commissioned by the Toledo Road Runners Club. At the annual Sri Chinmoy24-Hour Race in Ottawa, Ontario, Canada, the Sy Mah Award is given to the runner who completes at least 100 miles and runs the most even 50-mile splits. The wood-carved trophy is shaped to resemble an hourglass symbolizing Mah's "balance and steadiness". are held at the Ward M. Canaday Center at the University of Toledo.