Sport Science - Exploratorium's Sport Science shows the science behind many sports.
Evolution of Football Equipment
Leatherhead to Radio-Head: The Evolution of the Football Helmet
Innovations in Football Equipment
Innovation and Evolution: How Lacrosse Sticks Have Changed
How Sports Coaching Technology Could Change the Field of Coaching
Use NoodleTools to keep track of your resources. You will be need to be creative with your search terms. If you are finding too few results, think of synonyms or related terms. If you are finding too many results, think of how you might add or take away words to limit your results. Remember to take the time to read what you're referencing and to think about what you're reading: does it seem plausible; does it seem well researched; what are some examples of faked discoveries throughout history and how did those shape our current thinking?