0062 - CORRELATION OF MUSCLE STRENGTH AND GAIT STABILITY IN PATIENTS WITH END STAGE OSTEOARTHRITIS

M.R. Simons, G. Tawy, P. Rowe, N. Gleeson, L.C. Biant

Research output: Contribution to journalArticlepeer-review

Abstract

The hamstring and quadriceps muscles play an important role in knee mobility and stability. Knee osteoarthritis (OA) causes altered biomechanics. Pain inhibition results in disuse atrophy of surrounding musculature. This study investigated how measures of peak quadriceps and hamstring muscle force were correlated with knee range of motion (ROM) and stability of gait in patients with end-stage knee OA. Fifty patients requiring arthroplasty underwent bilateral electromyography (EMG) of quadriceps (RF & VL) and hamstrings (BF & SM/ST) using a custom-built dynamometer. Functional assessments were carried out using a bespoke motion capture system. Peak muscle strengths were correlated against knee ROM, walking speeds and gait stability in sagittal and frontal planes with Pearson's Correlation coefficients. Mean overall strength of quadriceps and hamstrings correlated with stability of gait. Isolated quadriceps strength did not correlate with knee ROM (r b 0.5, p N 0.05), walking speeds or sagittal plane gait stability. The affected knee was on averageweaker and less stable during gait compared to the contralateral knee. A weak positive correlation exists between hamstring strength and active ROM (r b 0.5, p b 0.05). Muscle performance plays an important role in moving and maintaining the stability of the knee during gait. Overall muscle strength of hamstrings and quadriceps correlates with stability in gait but not range of movement. Targeted physiotherapy of specific muscle groups around the knee may improve dynamic stability and personalisation of therapy.
Original languageEnglish
Pages (from-to)VII
JournalThe Knee
Volume24
Issue number6
DOIs
Publication statusPublished - Dec 2017

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