6/20/2023 0 Comments After effects of faintingLewis Maharam, a New York sports medicine physician and former medical director of the New York City Marathon. “It's one time that being athletic doesn't help you: in the middle of the night,” says Dr. The brain is extremely sensitive to oxygen starvation, so even momentary loss of oxygenated blood to the brain causes faintness. If you also have lower-than-average blood pressure-another common feature of competitive runners and other highly fit exercisers-this can exacerbate the problem. When you're lying in bed and your heart is beating only 40 times per minute, if you suddenly stand up, gravity causes blood to pool in your legs and your slowly beating heart takes slightly too long to get the blood back up to your brain. Play icon The triangle icon that indicates to play That's not usually a problem, but it is a cause of EAPH. Many competitive runners have resting heart rates of 40 to 50 beats per minute, significantly fewer than the normal 60 to 100. Spells of sudden dizziness on standing are actually a common side effect of high cardiovascular fitness, especially having a low resting heart rate. Generally, the episode passes in a few seconds with no lingering effects except, naturally, concern about whether what just happened indicates a potentially serious underlying medical condition. After a couple of steps, a wave of dizziness strikes and the sufferer may sway and experience dimming vision and buzzing in the ears. The classic example occurs at night, when a competitive runner, triathlete, or other hyper-fit person gets up to visit the bathroom. The medical term for this is exercise associated postural hypotension, or EAPH, and it's common. One of those is dizziness and fainting when rising suddenly from a lying position to standing. But there are some medical conditions, aside from injury, that you're more likely to experience if you're fit. Exercise is supposed to make us healthier and, for the most part, that's what it does.
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