Abstract
Sex differences in the knee joint have long been known and impaired proprioceptive accuracy is an important risk factor that could be associated with knee joint injury. This study was conducted to compare the accuracy of knee repositioning between healthy male and female adolescents. A total of 64 healthy adolescents (32 males, 32 females) aging from 15 to 18 years participated in this study. Active angle repositioning test was used to assess the proprioceptive accuracy of the right knee joint at 45° knee flexion by using a Biodex system 3 pro-isokinetic dynamometer. The statistical analysis revealed that the repositioning accuracy of the knee joint was significantly lower in female participants than in males, as the mean values of repositioning errors were 3.54±1.20 for males and 4.76±1.29 for females (P< 0.05). Sex-based difference in the accuracy of knee joint proprioception may imply that knee proprioceptive sensitivity might potentially contribute to the high incidence of knee injury in females compared with males, particularly during adolescence.
Highlights
Sex differences in the knee joint have long been known and impaired proprioceptive accuracy is an important risk factor that could be associated with knee joint injury
The purpose of this study was to compare the repositioning accuracy of the knee joint between healthy male and female adolescents, which may provide an understanding of the potential causes for increased incidence of knee injuries among females compared with their male counterparts
This study was conducted to compare the accuracy of knee repositioning between healthy male and female adolescents, which was measured using a Biodex system 3 pro-isokinetic dynamometer
Summary
Sex differences in the knee joint have long been known and impaired proprioceptive accuracy is an important risk factor that could be associated with knee joint injury. This study was conducted to compare the accuracy of knee repositioning between healthy male and female adolescents. Proprioceptive inputs are very important for normal individuals during daily activities as well as during sports. It plays an important role in the complex process of coordination and in the precise movement of joints to prevent joint damage and excessive range of motion through the proprioceptive reflex. Alteration of normal neuromuscular function is one of the main causes that contributes to knee injuries, which leads to weakness and atrophy of the quadriceps muscle group [7,8]. One of the factors responsible for this atrophy is arthrogenic muscle inhibition, a process in which the ongoing neural inhibition prevents the quadriceps from being fully activated [9]
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