Clinical Research Directory

Inclusion Criteria: * Female football players actively competing in the Turkish Women's First Football League * Regular natural menstrual cycles * Not using hormonal contraceptives * Bilateral Morton's toe morphology (distal end of the second toe extending more than 2 mm beyond that of the first toe in both feet) or bilateral non-Morton's toe morphology (distal end of the first toe extending more than 2 mm beyond that of the second toe in both feet) * Written informed consent Exclusion Criteria: * Not bilaterally meeting the Morton's toe or non-Morton's toe classification criteria, including a first-second toe length difference within ±2 mm (square foot) in either foot * Musculoskeletal injury affecting the lower extremity within the previous 12 months that prevented full participation in training and/or competition for more than 28 days * Body mass index \<18.5 or ≥30.0 kg/m² * Arch index \<7% (very high arch) or \>35% (very low arch) in at least one foot