RT journal article T1 Agreement between face-to-face and free software video analysis for assessing hamstring flexibility in adolescents A1 Moral Muñoz, José Antonio A1 Esteban Moreno, Bernabé A1 Arroyo Morales, Manuel A1 Cobo Martín, Manuel Jesús A1 Herera Viedma, Enrique A2 Enfermería y Fisioterapia K1 face-to-face clinical assessment K1 free-software video analysis K1 hamstrings flexibility K1 adolescents AB The objective of this study was to determine the level of agreement between face-to-face hamstring flexibility measurements and free software video analysis in adolescents. Reduced hamstring flexibility is common in adolescents (75% of boys and 35% of girls aged 10). The length of the hamstring muscle has an important role in both the effectiveness and the efficiency of basic human movements and reduced hamstring flexibility is related to various musculoskeletal conditions. There are various approaches to measuring hamstring flexibility with high reliability; the most commonly used approaches in the scientific literature are the Sit-and-Reach test (SRT), Hip Joint Angle (HJA) and Active Knee Extension (AKE). The assessment of hamstring flexibility using video analysis could help with adolescent flexibility follow-up. Fifty-four adolescents from a local school participated in a descriptive study of repeated measures using a crossover design. AKE and HJA were measured with an inclinometer and were simultaneously recorded with a video camera. Each video was downloaded to a computer and subsequently analyzed using Kinovea 0.8.15, a free-software application for movement analysis. All outcome measures showed reliability estimates with α>0.90. The lowest reliability was obtained for HJA (α=0.91). The preliminary findings support the use of a free software tool for assessing hamstring flexibility, offering health professionals a useful tool for adolescent flexibility follow-up. PB Wolters Kluwer SN 1064-8011 YR 2015 FD 2015 LK http://hdl.handle.net/10498/36680 UL http://hdl.handle.net/10498/36680 LA eng DS Repositorio Institucional de la Universidad de Cádiz RD 09-nov-2026