The PERT Study - Training Factors of PERformance and Injuries (PERT)

Male players from the first team and the reserve team of a French first-division professional football club, followed daily over one full competitive season through the club's routine monitoring of external workload, self-reported wellness and injury status.

No intervention was assigned. Data came from the club's usual daily monitoring: external workload measured by tracking technology during training sessions and matches, and self-reported sleep, fatigue, mood, pain and perceived intensity.

Daily injury status (non-injured or injured) recorded by the club's medical staff, used to describe season-long injury prevalence.

Age (years), professional status (reserve team or professional), playing position (defender, midfielder or forward) and number of previous injuries (0, 1 or ≥2), examined as putative factors associated with injury occurrence.

Measured by tracking technology during training sessions and matches: match exposure (yes or no), session duration (minutes), total distance covered (km), number of accelerations and decelerations per day, distance covered (m) and number of sprints per day at 80-90% and 90-100% of each player's individual maximal speed. Examined as putative factors associated with injury occurrence.

Sleep time (hours/day), sleep quality (1 = best to 7 = worst), mood (1 = best to 7 = worst), fatigue (1 = min to 7 = max), pain (1 = min to 7 = max) and perceived exertion (1 = min to 10 = max). Examined as putative factors associated with injury occurrence.