run
The pulse is a measure of the heart rate.
Caffine will speed up the heart rate.
I presume you mean, "Does caffeine speed up your heart rate?" Then... idk look it up
yes it does speed up dick
greasy food
Nicotine tends to increase heart rate and blood pressure by stimulating the release of adrenaline. This can result in a temporary speed-up of the heart rate.
exercise
the adrenaline.
your heartbeat will slow
because you are also worry or get excited or anything that makes you get excited can speed up your heart rate
The sympathetic nerves speed up the heart rate, while the parasympathetic nerves slow it down.
There are a great number of chemicals that can speed up or slow down the heart rate, as well as chemicals that can change the rhythm of your heart.