Postural control and thigh muscle activity in men with knee osteoarthritis

Associations of knee extensor strength and standing balance with physical function in knee osteoarthritis

“…Compared with people without knee OA, those with knee OA have lower knee extensor strength (force-generating capacity) (3)(4)(5)(6) and impaired standing balance (5)(6)(7)(8), commonly defined as greater postural body sway or center of pressure (COP) displacement, suggesting that both reduced knee extensor strength and standing balance are potential impairments to be evaluated in the research and clinical settings as they may influence functional limitations in knee OA. Although several observational studies have shown with reasonable consistency that knee extensor strength is an important determinant of physical function (4,9), evidence for the standing balance-physical function association is limited (4,5,7).…”

“…Although several observational studies have shown with reasonable consistency that knee extensor strength is an important determinant of physical function (4,9), evidence for the standing balance-physical function association is limited (4,5,7). In the first place, it is not a universal observation that patients with knee OA had greater standing COP displacements than did healthy controls (3,4,10). Furthermore, 3 cross-sectional studies (4,5,7) in patients with knee OA reported no significant association between standing balance and physical function in either bivariate or multivariable analyses.…”

Muscle Function during Selected Weight-Bearing Activities in Adults with Knee Osteoarthritis- A Narrative Overview

“…As well, the strength imbalance found between the knee flexors and extensors of an affected leg in the later stages of the disease or those imbalances within the muscle components alone [40] may promote further wear of the already disrupted surface as indicated by a recent anatomical study of the relationship between focal osteoarthritic lesion sites on the femoral condyle of the severely damaged knee, which showed these coincided quite consistently with the magnitude and site of the prevailing flexion contractures and the degree of loss of knee extension. Muscle weakness or imbalances that may arise consequent to injury, may thus prove harmful to the physiology of the adjacent joints and others over time, if the muscle dysfunction is not corrected optimally.…”

“…Patients had increases in postural sway, and quadriceps weakness Lee et al [31] 35 knee varus OA cases Knee strength + endurance Knee adduction moment during correlated with quadriceps endurance at 180 degrees/s Lyytinen et al [40] 54 men with OA 53 healthy men…”

The Effects of Virtual Reality Interactive Games on the Balance Ability of Elderly Women with Knee Osteoarthritis

“…These also result in an increase in joint instability and cause alterations in postural and balance controls (Lyytinen et al, 2010). In other words, weakened postural control and balance abilities due to osteoarthritis may be a major problem in old age activity limitations.…”