In this recap, Alex Calder and Adam Centofanti explore the evolution of performance testing through the lenses of Jordan Stewart-Mackie and Martin Buchheit. The conversation unpacks the challenge of balancing test sensitivity and specificity, and warns against the pitfalls of “overwatered” sports science—testing everything without understanding anything. The hosts outline clear frameworks for why, what, and how to test, based on athlete cohorts, positional demands, and individual injury histories.