Here is a good link on the health benefits of CoQ10. I have been taking it for 3 months now and I have to admit that I am absolutely a believer. I have noticed a tremendous difference in my stamina and cardio capacity in the last month. To say I have struggled with both my whole life would be an understatement. As an example I have cut 10 minutes off my walk time to school (2.5 miles, mostly uphill, from 45 to 35 minutes) and 15 minutes of a hike I do regularly, which is also mostly uphill and also about 2.5+ miles. I have decreased my time even though I had been quite sedentary most of the summer (so can't chalk it up to training). Not everyone will have the same response, but it is worth trying, especially if you have high BP, high cholesterol, or general exercise limitations or intolerance.

MNS