I work in the investment industry where a fund manager's performance is scrutinized in a scientific manner. How much of his performance is attributed to stock selection skill. How much to asset allocation decisions? There is a mathemetical formula for almost everything.
Maybe something similar is also available to measure a trainee's performance. How much is attributed to strength training? How much to conditioning? How much attributed to nutrition? How does supplements come into the picture?
Can you measure how these different factors contribute to a trainee's performance gains in a precise scientific manner?