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NEW YORK What do marathoners and heart failure patients have in common? More than you think according to new findings by physiologists at Columbia University Medical Center.

The new study shows that the fatigue that marathoners and other extreme athletes feel at the end of a race is caused by a tiny leak inside their muscles that probably also saps the energy from patients with heart failure.y fatigue invited NEW to YORK museum What The do Community marathoners Children's and Museum heart 77 failure E. patients Blackwell have St. in wil

The leak which allows calcium to continuously leak inside muscle cells weakens the force produced by the muscle and also turns on a protein-digesting enzyme that damages the muscle fibers. The new study found the leak was present in the muscle of mice after an intense three-week daily swimming regimen and in human athletes after three days of daily intense cycling. The same leak was previously discovered by Marks and colleagues in the muscles of animals with heart failure.ions olumbia must University be Medical submitted Center no researchers later show than leaky April muscle 15. cells Dover lead Teachers to communit