on the symptomatic knee to a broader view of both lower extremities.8 This is probably due to the fact that patients often demonstrate symptoms in both legs. Furthermore, even when one leg is asymptomatic, cartilage degeneration might already exist and may be confirmed by radiography.9,10 In addition, muscle dysfunction in one leg may be a factor in hastening the progression of joint breakdown in the contralateral leg.11,12 Accordingly, there is justification for evaluating quadriceps muscle performance and, particularly, quadriceps muscle fatigue of both lower extremities in patients with knee OA.
The purpose of this study was to compare the fatigability of the quadriceps muscle by assessing isometric contraction properties of both lower extremities in patients with knee OA. It was expected that the affected (or more affected) leg would have weaker maximal voluntary isometric contraction (MVIC) and a higher rate of fatigue compared to the contralateral leg.
on the symptomatic knee to a broader view of both lower extremities.8 This is probably due to the fact that patients often demonstrate symptoms in both legs. Furthermore, even when one leg is asymptomatic, cartilage degeneration might already exist and may be confirmed by radiography.9,10 In addition, muscle dysfunction in one leg may be a factor in hastening the progression of joint breakdown in the contralateral leg.11,12 Accordingly, there is justification for evaluating quadriceps muscle performance and, particularly, quadriceps muscle fatigue of both lower extremities in patients with knee OA.The purpose of this study was to compare the fatigability of the quadriceps muscle by assessing isometric contraction properties of both lower extremities in patients with knee OA. It was expected that the affected (or more affected) leg would have weaker maximal voluntary isometric contraction (MVIC) and a higher rate of fatigue compared to the contralateral leg.
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