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Sexual Dimorphism in Semitendinosus Muscle Dimensions Among Young Adults

Abstract

The study examines sexual dimorphism in the dimensions of the semitendinosus muscle among young adults, with emphasis on differences in selected muscle measurements between male and female participants. The semitendinosus is one of the three hamstring muscles located in the posterior compartment of the thigh and extends from the ischial tuberosity to the medial aspect of the proximal tibia. It contributes to hip extension, knee flexion, and medial rotation of the leg. Understanding differences in its dimensions may provide useful information on anatomical variation between the sexes and contribute to the assessment of normal musculoskeletal characteristics. The study will determine the dimensions of the semitendinosus muscle among young adults and compare the measured characteristics between male and female participants. The specific objectives will include measuring selected dimensions of the muscle, determining the mean measurements for each sex, assessing the degree of variation in the observed dimensions, and establishing whether significant differences exist between male and female participants. Where applicable, differences between the right and left sides will also be documented. A cross-sectional descriptive research design will be adopted for the study. An appropriate sample of young adult participants will be selected using a suitable sampling technique. Data on the dimensions of the semitendinosus will be obtained using standardized anatomical or imaging-based assessment procedures and appropriate measurement instruments. The collected data will be analyzed using descriptive statistics such as frequency, percentage, mean, and standard deviation, while appropriate inferential tests will be applied to compare the measurements between male and female participants. The study is expected to reveal variations in the dimensions of the semitendinosus among the participants, with male and female groups potentially demonstrating differences in selected muscle measurements. Some of the observed differences may be statistically significant, while other measurements may show considerable overlap between the groups. Side-related variation may also be observed where both limbs are assessed. The findings are expected to provide information on the extent of sex-related variation in semitendinosus muscle dimensions among young adults. The findings will be useful to anatomists, physiotherapists, orthopaedic surgeons, radiologists, sports medicine practitioners, rehabilitation specialists, and other healthcare professionals involved in lower limb assessment and management. The study may provide useful anatomical reference information for understanding differences in semitendinosus dimensions and may support clinical and imaging-based assessment of the posterior thigh and knee regions. The study will conclude by documenting the dimensional characteristics of the semitendinosus muscle and identifying the observed differences between male and female young adults. It is recommended that standardized anatomical and imaging-based measurement procedures be used when assessing the muscle, while further studies involving larger and more diverse populations should be conducted to establish broader reference values for semitendinosus muscle dimensions.

Keywords: Semitendinosus, sexual dimorphism, muscle dimensions, hamstring muscles, posterior thigh, muscle morphology, anatomical variation, lower limb, knee flexion, hip extension, medial rotation, young adults, sex differences, musculoskeletal anatomy, clinical anatomy.