Letters Section Editor: Stephen J. Lurie,
MD, PhD, Senior Editor.
To the Editor: Dr Tanasescu and colleagues1 report that some forms of apparently invigorating
exercise are not associated with any reduced risk of cardiovascular events.
Similarly, they found that exercise intensity may be more important than duration
for reducing the risk of CHD. Although the authors attempt to explain the
lack of benefit associated with more than 1 hour weekly of swimming or cycling
by noting that only several hundred of the study participants were in the
category claiming more than 1 hour weekly, they did not offer a similar rationale
for the nonsignificant effects of jogging or racquet sports. The authors did
find benefits of running and rowing more than 1 hour weekly, but the risk
ratios were less impressive than those associated with walking rapidly when
one chooses to walk at all.
Brody S. Exercise Intensity and Risk of Coronary Heart DiseaseExercise Intensity and Risk of Coronary Heart Disease. JAMA. 2003;289(4):419-420. doi:10.1001/jama.289.4.419-a