Varus thrust during walking is common in people with knee osteoarthritis (OA) and can increase the risk of disease progression. Lower limb muscle strength, particularly isokinetic strength, may play a role in varus thrust. The purpose of this study was to investigate the relationships between varus thrust and isokinetic strength knee extensors and flexors in people with and without knee OA .

Data from participants with (n = 28) and without (n = 68) knee OA were used. All participants underwent gait analysis during walking at a self-selected pace. Isokinetic knee extensor and flexor strength were measured at 60°/s and 120°/s. Varus thrust was measured using peak knee adduction velocity and knee adduction excursion during the first half of stance. Multiple linear regression was used to examine relationships between strength and varus thrust in the two groups separately while adjusting for age, sex, walking speed, and static alignment.

In those with knee OA, knee extensor (Model R² = 27.0%) and flexor torque (Model R² = 28.5%) at 60°/s were negatively associated with peak adduction velocity. No other associations were seen between strength and varus thrust measures in the OA group. No associations were seen in the control group.

Lower isokinetic knee extensor and flexor muscle at 60°/s strength is related to greater magnitude of varus thrust in individuals with knee OA but not in those without OA. Isokinetic strength deficits may be involved in varus thrust.

步行过程中内翻推力在膝骨关节炎（OA）患者中很常见，并且可能增加疾病进展的风险。下肢肌肉力量，特别是等速肌力量，可能在内翻推力中起作用。本研究的目的是探讨膝骨关节炎和非膝骨关节炎的内翻推力与等速肌力屈伸肌之间的关系。

使用来自（n = 28）和没有（n = 68）膝OA的参与者的数据。所有参与者以自行选择的步伐进行步态分析。等速膝伸肌和屈肌力量的测量值分别为60°/ s和120°/ s。在站立的前半段期间，使用峰值膝盖内收速度和膝盖内收偏移来测量内翻推力。多元线性回归被用来分别检查两组的力量和内翻推力之间的关系，同时调整年龄，性别，步行速度和静态对准。

在膝OA患者中， 以60°/ s的速度伸膝（模型R ²  = 27.0％）和屈肌扭矩（模型R ² = 28.5％）与峰值内收速度负相关。在OA组中，强度和内翻推力测量之间没有其他关联。在对照组中未发现任何关联。

等速膝关节伸肌和屈肌的低速运动强度为60°/ s与膝OA患者的内翻推力大小有关，而与OA患者无关。等速肌力不足可能与内翻推力有关。