1 doctor weighed in:

Does one's heart rate naturally increase when exposed to the sun?

1 doctor weighed in
Dr. Ibrahim Moussa
Internal Medicine - Cardiology

In brief: Yes and no

I not aware of a direct effect on sunlight on heart rate but heat and temperature does.
If it is hot or if your temperature is up then the heart rate will go up. Do an experiment check your pulse indoors in warm temps while being exposed to the sunlight versus checking it outside in direct sunlight. Check the abient temperature difference.

In brief: Yes and no

I not aware of a direct effect on sunlight on heart rate but heat and temperature does.
If it is hot or if your temperature is up then the heart rate will go up. Do an experiment check your pulse indoors in warm temps while being exposed to the sunlight versus checking it outside in direct sunlight. Check the abient temperature difference.
Dr. Ibrahim Moussa
Dr. Ibrahim Moussa
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