Believe I was about 16 or 17. I know it was my sophmore and junior years in HS. And as for the triple jump, technically both. The line for the triple jump starts way before the one for regular long jump. It makes it easier to measure the distance so they dont have to have someone standing there looking for where you started. The trickiest parts of long and triple jumping were getting your foot on the line when you jumped. That and making sure to keep your legs parallel to the ground for as long as possible.