Thought this article would be of interest to this group . . .
As in most everything, too much exercise--normally a very good thing--
can actually be bad for you.
Even though a key part of managing high blood pressure and heart
disease, new animal research suggests there CAN be too much of this
good thing. The August edition of the journal "Hypertension" reports
that researchers from the University of South Dakota found in
experiments with rats that excessive exercise worsened high blood
pressure and led to progression to heart failure in rats with high
blood pressure.
Because of all the previous findings about the benefits of exercise,
these new findings in rats are unexpected. An editorial published with
the study says that the implications for humans are not yet certain.
Dr. Paul Christian Schulze, of Boston University Medical Center, and
Satyam Sarma of Brown University warn that the findings "should raise
our awareness" of the potential harm intense exercise might do to
people with untreated high blood pressure.
Researchers found that rats which lived with a running wheel tended to
exercise excessively. The results, over time, were structural
abnormalities in the heart and a reduced pumping ability -- all of
which were worse in the active animals than in the sedentary ones.
It's likely that the rats "simply exercised too much."
It's obvious that scientists and clinicians now need to focus on
defining the fine line between beneficial and detrimental effects of
exercise.
Dave
Full text article above extracted from http://shamvswham.blogspot.com/