Isokinetic muscle strength of the knee in knee OA subjects, the general public and professional athletes: comparative and analytical study

Dr Karima BELHAJa, Dr Laila MAHIRa, Dr Soumia MEFTAHa, Prof Fatima LMIDMANIa, Prof Abdellatif EL FATIMIa

a Service de médecine physique et réadaptation- CHU IBN ROCHD

Introduction: isokinetic is a reference method for evaluation of muscle strength. The knee joint is still the most valued joint isokinetic

Aim of study:To compare the isokinetic profile 3 populations knee OA, professional athletes and subjects representing the general population.

Materials and methods: analytical comparative study including 30 knee OA patients, 20 professional athletes and 15 subjects representing the general population collected in physical medicine and functional rehabilitation of the CHU Ibn Rushd-CASABLANCA MOROCCO. All subjects had an isokinetic evaluation of the knee by a CYBEX brand-HUMAC dynamometer concentric fashion at the following speeds: 60 ° / s and 180 ° / s.

Results: The distribution of the variables is verified by the normality test of Shapiro-Wilk. The Kruskal Wallis test followed by Bonferroni post hoc test were used to compare different isokinetic variables of the three groups and objectified a significant difference in the following parameters: the peak maximum torque (PCM) of the quadriceps (Q) and IJ, the Labor Q and IJ, the power of Q and IJ between the 3 groups.

Discussion / conclusion: It is known that knee OA subjects complain of weakness with loss of function. With a normal age and equivalent to healthy subjects, the knee OA patients show a significant decrease in muscle strength. Muscle weakness alters the anteroposterior knee stability this affects the quality of travel. Physical activity appears to be a protective factor in the deterioration of the articular cartilage of the knee, which is well understood in athletes.


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Keywords : isokinetic- knee osteoarthritis-healthy-athletic-