Background: Muscle weakness in the lower limbs has adverse effects on walking performance and functional mobility in patients with stroke. Therefore, interventions aiming to improve muscle strength post stroke are considered crucial part of stroke rehabilitation.Objective: To determine the effectiveness of isokinetic strength training for knee and ankle muscles of the affected side on muscle strength, gait and functional mobility in chronic stroke. Materials and Methods:Thirty patients with stroke of both sexes (46-62 years) shared in this study. They were randomly assigned into two equal groups; experimental and control groups. Patients in the experimental group received a traditional physical therapy program in addition to isokinetic training for knee and ankle muscles in the affected side. Those in the control group received only the traditional physical therapy. Treatment was provided three times per week for eight successive weeks. The participants received pre and post-treatment assessments for the peak torque of the trained muscles, gait parameters and functional mobility as measured by the Timed Up and Go (TUG) test.Results: Patients in both groups showed significant improvement post treatment in peak torque of knee and ankle muscles, gait parameters and TUG test (p<0.05). Additionally, after the intervention, between-group comparison revealed significant difference for peak torque of both knee and ankle muscles (p<0.05), walk speed (t=2.44, p=0.02), gait cycle time (t=-3.43, p=0.002), single limb support (t=3.58, p=0.001) and TUG test (t=-3.45, p=0.002) in favor of the experimental group.Conclusion: Isokinetic strength training of the affected lower limb muscles in conjunction with proper physical therapy exercise program is effective in improving muscle strength, walking performance and functional mobility in patients with stroke.
Background: Muscle strength and proprioception deficits have been recognized in knee OA. Indirect evidence suggests that muscle strength and proprioception deficits may be interrelated. However, these relationships have never been clearly evaluated. Purpose: This study was conducted to investigate relationships between Proprioception deficits and onset of muscle activities during sit to stand in patients with unilateral knee osteoarthritis. Material and methods: 40 subjects from both genders of convenient sample were assigned into two equal groups; Group (A) consisted of 20 healthy control subjects, (8 males and 12 females) with mean age (47.4±2.28) and Group (B) consisted of 20 patients with UKOA (9 males and 11 females) with mean age (46.4±1.63). Proprioception measurement was recorded by taken three trials of active repositioning of knee joint. Onset of muscle activities of EMG signal recorded from vastus medialias and vastus lateralis muscles was measured by EMG during sit to stand. Results: Indicated that, there were significant differences between two groups in the onset of muscles activities of vastus medialis and vastus lateralis muscles, and proprioception where P-values were (0.03), (0.003) and (0.00) respectively. Also, there was significant positive correlation between proprioception and onset of muscles activities of vastus medialis where r2 value equals (0.592) and there was weak correlation between proprioception and onset of muscles activities of the vastus lateralis muscle where r2 value equals (0.381). Conclusion: Evidence was suggested that in the absence of adequate proprioceptive input, onset of muscle activities of quadriceps was greatly affected and the patient's level of activities is also affected to a greater degree especially during sit to stand activities.
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