Regular, Moderate Exercise Most Beneficial, While Excessive Endurance Training Can Be Too Much Of A Good Thing

Silly.

Micah True, legendary ultra-marathoner, died suddenly while on a routine 12-mile training run March 27, 2012. The mythic Caballo Blanco in the best-selling book, Born to Run, True would run as far as 100 miles in a day. On autopsy his heart was enlarged and scarred; he died of a lethal arrhythmia (irregularity of the heart rhythm). Although speculative, the pathologic changes in the heart of this 58 year-old veteran extreme endurance athlete may have been manifestations of "Phidippides cardiomyopathy," a condition caused by chronic excessive endurance exercise.

Besides the fact that they do not know if too much of a good thing caused True's death, isn't it axiomatic that "too much" is not good?

Otherwise, it would not be "too much," no?

This is the world of foregone conclusions, not meaningful research.