You have a wide variety of sports-related interests. Are you thinking of specializing in fitness related to one or more of these sports? That might be a way to set yourself apart in the industry since you have a specialty.
Another thing to consider about the fitness industry is that you have to be able to market and sell your services. You might consider a combination of business and fitness education.
Childhood obesity is a big problem and a growing area of fitness. With all of the sports that you do, coaching kids might be a good area for you, too. That could involve a degree in education with a concentration in fitness.