In general, if they prevent you from working in your profession, they are unenforceable in almost every state. This is for the simple reason that it is against

In general, if they prevent you from working in your profession, they are unenforceable in almost every state. This is for the simple reason that it is against the public's interest to have you on unemployment, and the state cares more about its coffers than business interests. This is as an employee of course.