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Clarksville, TN
A 21-year-old male asked:

why is my heart rate in the 40s at night? could it be heart block? no symptoms, feel perfectly fine. increases with exercise

1 doctor answer1 doctor weighed in
Dr. Marvin Ott
Emergency Medicine 20 years experience
Heart rate: is normally lowest at night, and in a young, healthy person, a night heart rate of 40's could be totally normal. However, if you are concerned, you may want to consider seeing your doctor to get testing to exclude other causes. Hope this helps!

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How does HDL cholesterol affect your chance of developing heart disease?

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Alexandria, VA
A 40-year-old female asked:

Why am I sometimes extremely dizzy after exercise? I work out frequently, eat well, drink more than 8x8 glasses of water a day.

2 doctor answers2 doctors weighed in
Dr. Robert Kwok
Pediatrics 33 years experience
Can be other causes: Dizziness with exercise doesn't just happen with inadequate hydration. If a person is well hydrated, and still gets dizzy, her doctor can evaluate. Sometimes there are circulation problems, such as not enough blood flow to the brain under certain conditions or activities. There can be heart problems, or not enough red blood cells (anemia), etc...

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Last updated May 10, 2018

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