Seven studies. 201 athletes. Five databases screened. This is what a meta-analysis looks like when the data actually tells a clean story.

Flywheel resistance training outperformed traditional weight training on change of direction performance with a standardized mean difference of 0.64. That might sound small. It isn't. The within-group effect for flywheel training came in at 1.63 — a large effect by any statistical convention. Traditional weights produced 0.62. The gap is real and it's consistent across every included study.

But the dose findings are where it gets interesting. Two sessions per week outperformed three. Twelve total sessions produced larger effects than seventeen. More training volume didn't just fail to add benefit — it actively reduced the effect size. The research points to one clear mechanism. Flywheel devices crea ...