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Relationship Between Flexor Hallucis Longus Muscle Length and Foot Length Among Young Adults

Abstract

The study examines the relationship between flexor hallucis longus muscle length and foot length among young adults, with emphasis on determining whether variation in the length of the muscle is associated with differences in overall foot length. The flexor hallucis longus is a deep muscle of the posterior compartment of the leg whose tendon passes behind the ankle and along the plantar aspect of the foot to the great toe. It plays an important role in flexion of the great toe and contributes to stability during standing and locomotion. Understanding the relationship between its length and foot dimensions is important for appreciating the anatomical proportions and functional characteristics of the lower limb. The study will determine the length of the flexor hallucis longus muscle and foot length among young adults using appropriate standardized anatomical, anthropometric, and imaging-based assessment procedures. The specific objectives will include measuring the length of the flexor hallucis longus muscle, determining the foot length of the participants, assessing the relationship between muscle length and foot length, and comparing the measurements between the right and left sides where applicable. A cross-sectional descriptive research design will be adopted for the study. An appropriate sample of young adults will be selected using a suitable sampling technique, while flexor hallucis longus muscle length will be assessed using appropriate anatomical landmarks and imaging procedures, and foot length will be obtained through standardized anthropometric measurement. Data obtained will be analyzed using descriptive statistics such as frequency, percentage, mean, and standard deviation, while appropriate correlation and regression analyses will be applied to determine the strength and direction of the relationship between flexor hallucis longus muscle length and foot length. The study is expected to reveal a measurable relationship between flexor hallucis longus muscle length and foot length among the participants. Individuals with greater foot length may demonstrate corresponding differences in muscle length, although the strength of the association may vary among participants. Differences between the right and left sides may also be observed, providing further information on the relationship between muscle dimensions and foot proportions. The findings will be useful to anatomists, physiotherapists, orthopedic surgeons, podiatrists, sports medicine practitioners, radiologists, and other healthcare professionals involved in the assessment and management of the lower limb and foot. The study may provide useful reference information for understanding the anatomical proportions of the flexor hallucis longus muscle and foot, interpreting musculoskeletal imaging, supporting biomechanical assessment, and informing clinical and rehabilitative procedures involving the ankle, foot, and great toe. The study will conclude by determining the relationship between flexor hallucis longus muscle length and foot length among young adults. It is recommended that the observed anatomical relationship be considered when assessing variations in lower limb and foot morphology, while further studies involving larger and more diverse populations should be conducted to establish broader reference data on flexor hallucis longus muscle dimensions and foot proportions.

Keywords: Flexor hallucis longus, muscle length, foot length, anatomical relationship, lower limb anatomy, foot anatomy, muscle dimensions, anthropometry, morphometry, young adults, posterior leg muscles, great toe, ankle anatomy, musculoskeletal anatomy, clinical anatomy.