Assistant Professor of Radiology, Department of Radiology and Imaging Sciences, Emory School of Medicine, Atlanta, GA.
Assistant Professor of Orthopedics, Department of Orthopaedic Surgery, Emory School of Medicine, Atlanta, GA.
J Foot Ankle Surg. 2020 Sep-Oct;59(5):898-902. doi: 10.1053/j.jfas.2020.01.009. Epub 2020 Jul 3.
This study aims to describe the normative Achilles tendon properties in a collegiate subject cohort. Achilles tendon evaluations in 65 asymptomatic college-level athletes by ultrasound B mode on two tendon positions (neutral state and active maximum dorsiflexion). Correlation was made to BMI, tibial/foot length, maximal calf circumference, type of sports, resting/maximal dorsiflexion-plantar flexion angles among other factors. The mean Achilles tendon length was found to be 14.9 cm, mean transverse dimension of 1.38 cm, thickness of 0.49 cm and cross-sectional area of 0.61 cm in the relaxed state. Males had greater tendon length than the female athletes (15.5 (M) vs 14.3cm (F) in the relaxed position and 16.1 (M) vs 15.2cm (F) in the stretched position), tendon width (1.4 vs 1.3 cm), tendon thickness (0.51 vs 0.46 cm), tendon cross-sectional area (0.65 vs 0.57 cm) and foot length (27.6 cm vs 26.6 cm). The Achilles tendon parameters such as length in the relaxed state had a statistically significant correlation with the height, weight, and foot length, while the tendon length in the dorsiflexed-stretched position had a statistically significant relationship to foot length, tibia length, calf circumference and range of motion (both in maximum dorsiflexion and plantar flexion positions; p < .05 for all comparison). Differences in the correlation between the Achilles tendon parameters and body habitus was recorded as a function of ankle position. Tendon dimensions and cross-sectional areas were larger in male vs female athletes. Calf circumferences and Achilles tendon resting angle were outlined. No significant difference was found in the Achilles tendon dimensions regardless of the leg dominance with similar range of motion regardless of athlete gender.
本研究旨在描述大学生群体中跟腱的正常参数。通过超声 B 型模式对 65 名无症状大学生运动员的跟腱进行评估，评估时采用两种跟腱位置（中立位和最大背屈位）。对 BMI、胫骨/足长、最大小腿周径、运动类型、休息/最大背屈-跖屈角度等因素与跟腱参数进行相关性分析。结果显示，在放松状态下，跟腱长度平均为 14.9cm，横径为 1.38cm，厚度为 0.49cm，横截面积为 0.61cm。男性跟腱长度大于女性运动员（放松位时男性为 15.5cm，女性为 14.3cm；伸展位时男性为 16.1cm，女性为 15.2cm）、跟腱宽度（1.4cm 对 1.3cm）、跟腱厚度（0.51cm 对 0.46cm）、跟腱横截面积（0.65cm 对 0.57cm）和足长（27.6cm 对 26.6cm）。在放松状态下，跟腱参数如长度与身高、体重和足长呈显著相关，而在背屈伸展位时，跟腱长度与足长、胫骨长度、小腿周径和运动范围（最大背屈和跖屈位）呈显著相关（所有比较均为 p<0.05）。记录了跟腱参数与身体形态之间的相关性差异，这是踝关节位置的函数。男性运动员的跟腱尺寸和横截面积大于女性运动员。记录了小腿周径和跟腱静息角度。无论运动员的性别如何，跟腱的尺寸都没有明显差异，运动范围也相似，与腿部优势无关。
