A common question for many individuals interested in a sports medicine career is what college undergraduate degree they should be going for. The thing to remember is the sports part comes after the basic medicine part.
What you major in as an undergrad just isn't that important. With that being said, you must have taken and done well in all the science and math premed courses.
Your goal should be to have the grades and the knowledge needed to get into medical school. Stay focused on a pre-med curriculum (calculus, physics, at least a year of chemistry and at least a year of biology).
Attend a university that has a well established pre-med curriculum. You can’t take “Everyday Chemistry 101? and expect a medical school to only look for “chemistry.” Instead look for courses like organic and inorganic chemistry.