Kang Kyung Woo, Son Sung Min, Kwon Yonghyun
Department of Physical Therapy, Yeungnam University College, Hyunchung-ro, Nam-gu, Daegu 42415, Korea.
Department of Physical Therapy, College of Health Science, Cheongju University, Cheongwon-gu, Chungcheongbuk-do 28503, Korea.
J Back Musculoskelet Rehabil. 2020;33(2):201-207. doi: 10.3233/BMR-181195.
Many studies have investigated the correlation between muscle torque and joint position sense (JPS), but few studies have been performed on the correlation between torque ratio and JPS.
The aim of this study was to investigate JPS and muscle torque ratios of agonist and antagonist muscles in the ankle and knee joints of young adults.
A total of 38 right handed healthy participants, 12 males and 26 females, were recruited. All participants measured their peak torque of knee flexor/extensor and ankle dorsiflexor/plantar flexor by using a Biodex system. They also used the Biodex to assess the proprioception through active joint reposition sense test in knee and ankle joint. Peak torque of each muscle, agonist/antagonist torque ratio and JPS error were collected, and Pearson's correlation analysis was used to examine correlations between peak torque, torque ratio and JPS error.
For knee joints, correlations were found between flexion and extension torque, extension torque and torque ratio, and torque ratio and JPS error (r= 0.825/p= 0.000, r=-0.482/p= 0.002, and r=-0.685/p= 0.000, respectively). For ankle joints, correlations were found between dorsiflexion and plantar flexion torques, plantar flexion torque and torque ratio, plantar flexion torque and JPS, and torque ratio and JPS (r= 0.654/p= 0.000, r=-0.621/p= 0.000, r=-0.563/p= 0.000, and r=-0.761/p= 0.000, respectively).
JPS error of lower extremity joint may be more related with agonist/antagonist torque ratio rather than peak torque. Therefore, people who will have training for reducing JPS error need to consider torque ratio, too.
许多研究调查了肌肉扭矩与关节位置觉（JPS）之间的相关性，但关于扭矩比与JPS之间相关性的研究较少。
本研究旨在调查年轻成年人踝关节和膝关节中主动肌和拮抗肌的JPS及肌肉扭矩比。
共招募了38名右利手健康参与者，其中男性12名，女性26名。所有参与者使用Biodex系统测量其膝关节屈肌/伸肌以及踝关节背屈肌/跖屈肌的峰值扭矩。他们还使用Biodex通过膝关节和踝关节的主动关节复位觉测试来评估本体感觉。收集每块肌肉的峰值扭矩、主动肌/拮抗肌扭矩比和JPS误差，并使用Pearson相关分析来检验峰值扭矩、扭矩比和JPS误差之间的相关性。
对于膝关节，发现屈曲扭矩与伸展扭矩、伸展扭矩与扭矩比以及扭矩比与JPS误差之间存在相关性（分别为r = 0.825/p = 0.000，r = -0.482/p = 0.002，以及r = -0.685/p = 0.000）。对于踝关节，发现背屈扭矩与跖屈扭矩、跖屈扭矩与扭矩比、跖屈扭矩与JPS以及扭矩比与JPS之间存在相关性（分别为r = 0.654/p = 0.000，r = -0.621/p = 0.000，r = -0.563/p = 0.000，以及r = -0.761/p = 0.000）。
下肢关节的JPS误差可能与主动肌/拮抗肌扭矩比而非峰值扭矩更相关。因此，对于将进行减少JPS误差训练的人也需要考虑扭矩比。
