Abstract：
Patellar tendinopathy is more prevalent in males versus female athletes and commonly presents in the medial region of the tendon. Separate measures of patellar tendon strain in the medial, central, and lateral regions of the tendon, however, have not been quantified. The purpose was to investigate the differences in tendon strain between the medial, lateral, and central regions of the patellar tendon in healthy men and women. Strain in the medial and lateral regions of the patellar tendon in healthy participants (10 males, 10 females) was evaluated using ultrasound during isometric quadriceps contractions at 20%, 40%, 60%, 80%, and 100% of maximum voluntary contraction (MVIC) in 60° and 90° of knee flexion. Central strain was also measured at 60% MVIC in 90° of knee flexion. Mixed models were used to determine strain between tendon regions and sex at 60% MVIC in 90° of knee flexion. Sequential modeling was used to fit region, sex, %MVIC, and angle to predict strain. The central region had less strain compared with both medial and lateral regions. The lateral region had higher strain compared with the medial region regardless of sex. Females had higher strain compared with males, regardless of region. Knee position did not influence tendon strain. Patellar tendon strain differs by region and sex. The varying prevalence between sex and in location of patellar tendinopathy may in part be explained by the unbalanced strains. Differential assessment of regional patellar tendon strain may be of importance for understanding injury risk and recovery with exercise.
摘要：
髌骨肌腱病在男性运动员比女性运动员中更为普遍，并且通常出现在肌腱的内侧区域。内侧髌腱应变的单独测量，中央,和肌腱的外侧区域，然而,没有被量化。目的是研究内侧肌腱应变的差异，横向,健康男性和女性的髌腱中心区域。健康参与者髌腱内侧和外侧区域的应变（10名男性，10名女性）在20％的等距股四头肌收缩期间使用超声进行评估，40%,60%,80%,膝关节屈曲60°和90°时最大自主收缩（MVIC）为100％。在膝关节屈曲90°时，在60％MVIC处也测量了中央应变。在膝关节屈曲90°时，使用混合模型确定60％MVIC时肌腱区域和性别之间的应变。顺序建模用于拟合区域，性别,%MVIC,和角度来预测应变。与内侧和外侧区域相比，中央区域的应变较小。无论性别如何，外侧区域的应变均高于内侧区域。与男性相比，女性的品系更高，无论地区。膝关节位置不影响肌腱应变。髌腱应变因地区和性别而异。髌腱病的性别和位置之间的患病率差异可能部分是由不平衡的菌株解释的。局部髌腱劳损的差异评估对于了解损伤风险和运动恢复可能很重要。
