Triple Jump?

I jumped 38' in my first tj meet of the winter season. I'm a sophmore and my best when I was a freshman was 34'. How'd I get so much better? I mean i didn't to anything to train for it. Also, should i be able to long jump more then 17'9 if I can triple 38? thanks|||LJ and TJ are sorta different, but its a good goal (thats a good lenght as a sophmore-nice job). you may have lost weight or gained muscle-or just got better with running and have stronger legs. i remeber i gained 6 inches on my HJ in a week (championship week too)|||just by getting older and growing more makes you jump higher. you are a teenager so you are a growing person and one more year means increased stats.