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Effect of Physical Activity over the Knee Angle in Healthy Children with or without Flatfeet

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Background: Physical activity influences the children’s lower limb morphological changes. Different degrees of foot posture have varying impacts over the tibiofemoral angle. Purpose: This study was carried out to analyze and determine whether physical activity, football, impacts the knee angle, varus, or valgus and whether the altered alignment is more severe with the association of different foot postures; neutral, pronated, or supinated. Methods: One hundred children (mean age 9.5 ± 3.61674) who regularly participated in football were selected. The outcome measures used were the tibiofemoral angle (TFA), the Children’s Physical Activity Questionnaire (CPAQ), and Foot Posture Index (FPI) was used to assess the children. Results: The following results were obtained, pre and post-test of the TFA right and left sides: 6.21 ± 1.61 and 6.16 ± 1.61, respectively. The pre-test CPAQ was 3.77 ± 0.42, and the post-test was 4.12 ± 0.50. The FPI concerning the TFA showed no significant difference between pre and post-test scores in children with neutral, pronated, or supinated feet. Conclusion: Physical activity had no significant influence on the knee angle in healthy children with or without flatfeet to cause an alteration or structural changes in the knee joint. Additionally, considerations could be made in the musculoskeletal components regarding injury prevention.


Clarionda Donna Mukhim, V Kalidasan, Neetha R G Effect of Physical Activity over the Knee Angle in Healthy Children with or without Flatfeet. Cardiometry; No.26 February 2023; p.-; DOI: .; Available from:


Children,  Football,  Tibio-femoral angle,  Foot posture index,  Physical activity,  Children physical activity questionnaire
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