Obvious answer your heart and your muscles need plenty of oxygen and if you don't have enough oxygen, your heart needs to work harder so you don't die.
The pulse is a measure of the heart rate.
Caffine will speed up the heart rate.
run
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.
the adrenaline.
your heartbeat will slow
exercise
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.