Listen to your coaches. Yeah, they may seem like major asses sometimes, but they have been through all the same things you have as a highschool wrestler. Also, chances are they were pretty successful, so they might just know a thing or two about wrestling. Anyway, they all know what kind of effort it takes to run a practice, and they can see through you lame excuses as to why you don't want to practice (yeah, we've all tried it).