In the sentence Jumping up and down is a bad idea if you have just eaten chili dogs., the phrase jumping up and downis the subject.
no.
Jumping up and down
You come up, you come down.
A pea jumping
ham string
Uh to practice jumping??
The letters were jumping up and down to be read.
Haha. I see that you've heard the myth. No, in fact jumping up and down w/o a bra will NOT make your breast grow. Sorry!
Gravity (the Earth's pull) drags your body back down.
It's a fat chick jumping up and down on to a trampoline
Jumping repeatedly exercises muscles in your feet, ankles, lower and upper legs, bottom, back, arms, and shoulders and neck. That means that jumping up and down is a really great exercise.