make sure your harness is adjusted to you, you should be able to stand up straight and "fill up" your harness. Just remember 3 points of contact: back, hips, and chest. also, when you have the time in between reps, bend over forward and stretch your lower back.
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Egg Harbor Township Class of 2008 (Percussion Captain, Tenors)
Raiders Drum and Bugle Corps 2007-08 (Bass 4, Bass 1)
West Chester University Class of 2012 (Bass 2, section leader)