Exercise and Atherosclerosis

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Extreme exercise more harmful than good

It seems to make sense that exercise would reduce the risk of hear attack and stroke, but this actually depends on a variety of factors. The truth is that extreme exercise is fraught with dangers: exercising vigorously can actually cause an aneurysm to burst or even cause a fragile, atheroscelerotic blood vessel to rupture. Furthermore, if done improperly, intense exercise can actually worsen atherosclerosis by increasing free-radical generation and lipid peroxidation.

...the main source of free radicals--those angry little molecular particles that attempt to destroy everything in our cells, DNA, membranes, and proteins--is metabolism itself. When we exercise, we increase our metabolism. And intense exercise increases metabolism dramatically and for many hours afterward, which can do a lot of damage to our cell membranes, metabolic enzymes, and DNA. Remember, while we can repair a loft of this damage, the unrepaired portion accumulates.

Health and Nutrition Secrets (that could save your life), Dr Russell L. Blaylock, MD

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