biostudies-literatureUnknown17(1)Mercan N<h4>Background</h4>Football's repetitive lower-extremity biomechanics may drive functional adaptations in the hamstrings and spinopelvic alignment. We hypothesised that footballers would display greater hamstring stiffness and morphometric differences in SPPs, attributable to sport-specific loading, compared with non-athletes. This study therefore investigates the interrelationships among hamstring stiffness, flexibility, and spinopelvic alignment to clarify football-induced adaptations.<h4>Methods</h4>This cross-sectional study included 50 licensed amateur male football players (Group A; mean age 21.74 ± 2.91 years) and 50 healthy males with no licensed sports participation (Group B; mean age 23.14 ± 2.98 years). Measurements comprised radiographic assessment of SPPs, Shear-Wave elastograBMC sports science, medicine & rehabilitation219https://www.ebi.ac.uk/biostudies/studies/S-EPMC12308992biostudies-literatureHigh hamstring stiffness and flexibility with comparable spinopelvic morphometry in amateur footballers: a multimodal study.PMC12308992Citil STuncay IBilsel KMercan NElmali NfalseHigh hamstring stiffness and flexibility with comparable spinopelvic morphometry in amateur footballers: a multimodal study.<h4>Background</h4>Football's repetitive lower-extremity biomechanics may drive functional adaptations in the hamstrings and spinopelvic alignment. We hypothesised that footballers would display greater hamstring stiffness and morphometric differences in SPPs, attributable to sport-specific loading, compared with non-athletes. This study therefore investigates the interrelationships among hamstring stiffness, flexibility, and spinopelvic alignment to clarify football-induced adaptations.<h4>Methods</h4>This cross-sectional study included 50 licensed amateur male football players (Group A; mean age 21.74 ± 2.91 years) and 50 healthy males with no licensed sports participation (Group B; mean age 23.14 ± 2.98 years). Measurements comprised radiographic assessment of SPPs, Shear-Wave elastogra2025-01-01T00:00:00Z2025 Jul2026-03-31T10:35:02.201Z2025-08-24T03:05:53.016ZS-EPMC123089924073927310.1186/s13102-025-01265-5