you need to take some business courses, i'm not saying a university degree, but you need to know some basic things about the way a business is run, the economy, etc.kineisiology is definately a good choice, however, another 4 - 6 years in college.
biology, anatomy, sports medicine, nitrition, are other good options, or if your credit is outstanding, and you have proper collateral and you think you know what your doing just getr the bank to loan you a whack of money now.