Dataset for: "The effect of plyometric training on physical performance in youth soccer players: A randomized controlled trial with maturation status as a covariate"

This study was a 12-week randomized controlled trial designed to investigate the impact of biological maturity on the effectiveness of plyometric training in adolescent soccer players. Participants were divided into pre- and post-peak height velocity based on maturity offset estimated using the Mirwald method. Within each group, participants were randomized into plyometric group or control group. The study protocol was registered at ClinicalTrials.gov (NCT06406764). Forty-five male adolescent soccer players, aged 10 to 18 years, were recruited. Ethical approval was obtained from the Ethics Committee of the Faculty of Physical Culture, Palacký University Olomouc (reference number 10/2024), and informed consent was received from participants and their legal guardians. Testing was performed before the training (pre-test) and after 12 weeks of training (post-test). Testing included: anthropometry, 20-m sprint, L-run, countermovement jump, broad jump, unilateral triple jump, 30-cm drop jump, and 20 submaximal hops at 2.5 Hz. The plyometric training program was structured based on contemporary research in youth plyometric training, emphasizing performance enhancement and injury prevention. The intervention was carried out during the competitive season and was implemented twice weekly within standard training sessions for 12 weeks.