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An enlarged heart can be seen at echocardiography or sometimes on a chest X-ray. Similarities at presentation between athlete's heart and clinically relevant cardiac problems may prompt electrocardiography (ECG) and exercise cardiac stress tests. The ECG can detect sinus bradycardia, a resting heart rate of fewer than 60 beats per minute.
The damage is induced through repetitive mechanical motions such as prolonged marching (march hemoglobinuria) and marathon running. [2] [3] Mechanical damage can also be induced through the chronic condition microangiopathic hemolytic anemia or due to prosthetic heart valves. [1]
The incidence of EAH in athletes has increased in recent years, especially in the United States, as marathon races and endurance events have become more popular. [3] A recent study showed 13% of the Boston 2002 marathon runners experienced EAH; most cases were mild. [2] Eight deaths from EAH have been documented since 1985. [2]
James Fuller Fixx (April 23, 1932 – July 20, 1984) was an American who wrote the 1977 best-selling book The Complete Book of Running.He is credited with helping start America's fitness revolution by popularizing the sport of running and demonstrating the health benefits of regular jogging.
To sustain high intensity running, a marathon runner must obtain sufficient glycogen stores. Glycogen can be found in the skeletal muscles or liver. With low levels of glycogen stores at the onset of the marathon, premature depletion of these stores can reduce performance or even prevent completion of the race.
Dallas Marathon: Dallas, US Heart attack USA: Thomas Becker [10] 40 8 October 1989 Twin Cities Marathon: Minneapolis, US Heart attack USA: William McKinney [11] 59 4 March 1990 Los Angeles Marathon: Los Angeles, US Heart attack USA: Lisa B. Christensen [12] 19 4 November 1990 Marine Corps Marathon: Washington, D.C., US Coronary artery ...
A 2006 study of non-elite Boston Marathon participants tested runners for certain proteins that indicate heart damage or dysfunction (see Troponin) and gave them echocardiogram scans, before and after the marathon. The study revealed that, in that sample of 60 people, runners who had averaged fewer than 56 km (35 mi) of weekly training in the 4 ...
Fixx is credited with popularizing the sport of running and contributing to the 1970s running boom through regular media appearances that touted the health benefits of exercise. Predisposed to heart problems, Fixx died at age 52 of a heart attack after his daily run, which opened up discussion about the links between running, health, and life ...