Many physicians, including those whose study was published in the journal Circulation, believe there is such a thing as too much exercise.? 60 Boston Marathon participants were screned before the 2004 and 2005 races.? They showed normal cardiac function.
The same subjects were tested again after the races. 60% of them had elevated troponin levels.? Troponin is a marker in the blood used to help diagnose a heart attack, and to detect mild to severe heart injury.? Troponin tests are ordered primarily for people who have chest pain to see if there is damage to the heart.? 40% of the participants who had elevated trponin levels had levels at or above the decision limit for acute myocardial necrosis.? Meaning, some heart tissue, as in a heart attack, possibly died.??
Conclusion: DON’T OVERDO IT.? Extreme endurance events are associated with cardiac dysfunction in several studies, especially for those with less training.
