Please help me choose topics for the common app essays

<p>Well, for my long essay, i am basically done and it is about being an emt, and saving some kid's life. </p>

<p>My question is what I should write for the shorter essay, the one about your most meaningful ec. I have two topics, one is how I love to run and the other is being and aquatics instructor for 3 and 4 year-olds. Being that my longer one is about community service, should i write about something i am dedicated to or write more about helping the community?</p>

<p>input please!</p>