Correlation between the medial longitudinal arch and foot-related quality of life in recreational runners: a cross-sectional study

BACKGROUND: The foot's anatomical structure, specifically the medial longitudinal arch (MLA), is critical in running biomechanics, as it absorbs impact forces and facilitates movement. Alterations in MLA structure can lead to abnormal foot kinematics, increasing susceptibility to injuries and negatively impacting foot functionality. AIM: This study aims to explore the potential impact of MLA height on recreational runners' quality of life (QoL) and determine the correlation between MLA height and foot-related QoL. METHODOLOGY: A cross-sectional study was conducted on 38 recreational runners aged 18-30, classified into three MLA groups (low, normal, high) using the Arch Height Index (AHI). Foot functionality and QoL were assessed using the Foot and Ankle Ability Measure (FAAM) questionnaire, including 22 items for Activities of Daily Living (ADL) and 8 for sports-related activities. RESULTS: Low MLA was positively correlated with higher FAAM scores in both ADL (AHI-Right = 0.79, AHI-Left = 0.71) and sports subscales (AHI-Right = 0.67, AHI-Left = 0.53; p<0.01). Conversely, high MLA showed a negative correlation with ADL (AHI-Right = -0.44, AHI-Left = -0.44) and sports subscales (AHI-Right = -0.60, AHI-Left = -0.70; p>0.05). CONCLUSION: MLA height is inversely correlated with QoL in recreational runners, suggesting that both high and low MLA heights may impact functional quality of life.