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Exercise, emotions, drugs can make your heart rate increase.
footworking music makes your heart rate go up :)
Simple really. If your upset or afraid your heart rate will go up do to adrenaline.
your body produces a hormone,Adrenaline, that increases your heart rate.
If someone who works out occassionally does 50 sit-ups, yes the heart rate will go up *some*. If someone is very out of shape, the heart rate could go up substantially. If someone works out every day or is an athelete, the heart rate may not go up much at all.
because the fast as your body go your heart go the same amount
i heard it should go up 50%, but on my recumbent excercise bike ,it says to go from 90 up to 111
no only underwater super diving can increase your heart rate
no
it dose not go up
it varies according to the kind of work you are doing.
I presume you mean, "Does caffeine speed up your heart rate?" Then... idk look it up