PURPOSE Previous research has rarely examined foot segment motion and muscle activity simultaneously in relation to foot type. Therefore, this study aimed to investigate how foot type influences segmental foot kinematics and lower limb biomechanics during walking. METHODS Fifty-eight healthy adults were sorted into normal group (NG), pes planus group (PPG), or pes cavus group (PCG) using the Foot Posture Index, navicular drop, normalized navicular height, and normalized instep height. Furthermore, three-dimensional foot kinematics and lower limb muscle activity were recorded during 12-meter, self-paced walking using an optical motion capture system and surface electromyography. Kinematic analysis during the stance phase included measurement of joint angles and ranges of motion (ROM) for the following segments: foot relative to the shank, forefoot relative to the midfoot, lateral forefoot relative to the midfoot, medial forefoot relative to the midfoot, and hallux relative to the medial forefoot. Moreover, muscle activity analysis included the tibialis anterior, peroneus longus, and medial and lateral heads of the gastrocnemius. RESULTS Compared with the NG and PPG, the PCG exhibited greater ROMs in the frontal plane for the forefoot relative to the midfoot and medial forefoot relative to the midfoot. Additionally, the PPG exhibited a greater ROM in the frontal plane for the hallux relative to the medial forefoot compared with the NG. The intersegmental angles according to foot type demonstrated distinct kinematic differences between the PPG and NG in the transverse plane, specifically in the forefoot relative to the midfoot and medial forefoot relative to the midfoot relationships. However, no significant differences were observed in lower limb muscle activity during the stance phase. CONCLUSIONS This study provides insights into kinematic changes according to foot type during walking. Moreover, the findings of this study may deepen our understanding of the intrinsic risk factors for lower extremity injuries and tissue stress associated with variations in foot type.
PURPOSE Recently, local governments have demonstrated an increased interest in sports cities to strategically ensure sustainable urban competitiveness, revitalize the local economy, and improve residents’ quality of life. Therefore, this study identifies key factors and their priorities for building a sustainable sports city image in noncapital local governments based on city branding and local governance theories. METHODS Data were collected from a panel of 15 experts in sports cities using modified Delphi method and the analytic hierarchy process and analyzed using SPSS 23.0, Excel, and the cloud-based research automation platform SSRA, obtaining means, standard deviations, content validity ratios, interquartile ranges, stability, convergence, consensus, and consistency ratios. RESULTS The Delphi survey produced 6 key factors and 27 items. The key factors, according to relative importance, were as follows: “securing adequate financial resource,” “support from local government,” “revitalization of community-based sports activities,” “establishment governance among stakeholders,” “efforts toward sports city branding,” and “promotion of sports industry.” For each factor, important items were “mayoral interest and commitment,” “building cooperative networks with sport federations, local sports associations, and education offices,” “sufficient budgetary support from the local government,” “development of sports infrastructure,” “attracting professional sports teams,” and “designation and development of locally specialized sports.” CONCLUSIONS Local governments should first establish structural foundations by securing sufficient budgets and providing administrative support, among other tasks, as a starting point for designing sports city policies. When branding strategies that systematically strengthen a sports city’s identity and symbolism are organically linked based on these structural conditions, the effectiveness and sustainability of sports city policies can be further enhanced.
