cardiovascular risk by a factor of two or three in the long run, but while we're doing vigorous exercise such as marathon running, our cardiac risk increases by seven." 161 162 Hydration edit A volunteer hands. In many cases the marathon organizers are required to reopen the roads to the public so that traffic can return to normal. And some have done it as many as eight times. "Hyponatremia among runners in the Boston Marathon". Retrieved 28 November 2007. 100 Participation edit In 2016, Running USA estimated that there were approximately 507,600 marathon finishers in the United States, 101 while other sources reported greater than 550,000 finishers. "Boston Marathon: five historic moments".
3 In 2005, the average marathon time in the.S. 103 Multiple marathons edit As marathon running has become more popular, some athletes have undertaken challenges involving running a series of marathons. Cynthia Lucero died at the age of 28 while participating in the 2002 Boston Marathon. "Ernst Van Dyk wins record 9th wheelchair title". Retrieved Whitsett. 157 Health risks edit See also: List of marathon fatalities Marathon running has various health risks. Burton Holmes ' photograph entitled "1896: Three athletes in training for the marathon at the Olympic Games in Athens". The New England Journal of Medicine. 18 19 The women's marathon was introduced at the 1984 Summer Olympics (Los Angeles, USA) and was won by Joan Benoit of the United States with a time of 2 hours 24 minutes and 52 seconds. See also edit Notes and references edit Notes In modern Greek the sports event is called Marathonios Dromos ( ) or simply Marathonios. 44 45 The course was later altered to use a different entrance to the stadium, followed by a partial lap of 385 yards to the same finish. The study revealed that, in that sample of 60 people, runners who had done less than 56 km (35 mi) of weekly training before the race were most likely to show some heart damage or dysfunction, while runners who had done more than 72 km (45 mi) of weekly.