The 95% confidence intervals in minutes per game preceding the Achilles tear vs the rest of their season. 10 games: 24.5-33.5 vs 23.2-31.6 15 games: 24.2-33.0 vs 23.2-31.6 A statistical difference, but not a clinical one.
This study is a textbook example of statistical significance not meaning clinical significance. The "small spikes" equated to a couple minutes. I'm confident saying these "small spikes" were ultimately meaningless. It's also the problem of using linear statistics to explain nonlinear dynamics.