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Old 08-03-13, 08:59 PM
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Originally Posted by DnvrFox View Post
Mine drops. I have read that it is also associated with a change in the size/resistance or?? of the blood vessels. Please see below and the link

Exercise Response

When you exercise, your working muscles need more blood and oxygen to function. This increased demand forces your heart to beat faster, thus pumping out more blood with each beat. When your heart rate and blood volume increases, so does the pressure of the blood on the arterial walls. Therefore, while you are actually engaging in exercise, your systolic blood pressure will temporarily rise, and your diastolic, or bottom number, will stay the same or drop slightly. The benefit of exercise on blood pressure occurs after physical activity. After a bout of exercise, the blood vessels throughout your body dilate. This relaxation of the vessels creates wider openings for the blood to flow through, therefore reducing the amount of resistance and pressure on the walls. This dilation can last for several hours after exercise, resulting in lower systolic and diastolic blood pressure readings.

Read more:
This. I do recall, too, that level of fitness has an effect on how low it goes. I can definitely say that, when I first came back to riding and was able to put out some kind of sustained effort, I had about a minute after getting off the bike to make it to the couch before I blacked out. Then I learned about cool down laps In any event, it'snot a problem for me now but it still gets down pretty low. I've seen 102/68. I've seen lower, too.
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