This dataset contains weekly bilateral isometric hip adduction and abduction strength measurements collected from an elite male soccer cohort across a full competitive season. All player names have been replaced with anonymised identifiers (P01–P17). Dates have been removed. All other variables are unchanged from the original analysis dataset. Callaway, A. J., Dunne, C., & Williams, J. (2026). Group normative data and arbitrary asymmetry thresholds fail to represent individual players in weekly hip strength monitoring. Scientific Reports.