Thanks for the article. Of course we need to consider the
source... It helps to read an article very carefully, and pay
special attention to the primary source references. With that in
mind, let's look at a few of them. Lead author Dr James O’Keefe,
of Saint Luke’s Hospital of Kansas City, said exercise was
generally beneficial for health but could tip into becoming
harmful when taken to excessive lengths. So excessive exercise
is harmful. And water is wet. Noted... Dr O’Keefe and colleagues
said research suggests that extreme endurance training can cause
transient structural cardiovascular changes and elevations of
cardiac biomarkers, all of which return to normal within one
week. But for some individuals, over months and years of
repetitive injury, this process can lead to the development of
patchy scarring of certain areas of the heart, and abnormal
heart rhythms. So most people are find even when engaging in
"extreme" endurance training . And some individuals, not so
much. Noted... So what's the magnitude