I would like some exercise i can do to jump higher in the high jump .Their are only 2 JV boys (me and a Friend) that are doing the high jump. I can jump about 5 feet 1 inch and he can jump about 5 feet 3 inches and i would like to be able to beat him in our next track meet on april 14 and i was wondering what i could do to get a higher jump than him by then. Pls help?