Effectiveness of increasing intensity of task – oriented strength training exercises for arm function after stroke – A Randomize Clinical Trial.

Abstract

Background: Stroke is a disorder where brain is damaged either by blockage in the blood vessels or rupture of the blood vessels. Stroke often leads to significant arm weakness and impaired motor function, affecting daily activities and quality of life. Task-oriented strength training, which focuses on repetitive, goal-directed movements, has shown promise in improving arm function after stroke. Objective: The main objective of the study is to determine if higher intensity training leads to greater improvements in muscle strength, motor control, and overall functional use of the affected arm compared to standard or lower-intensity training protocols. insights for optimizing rehabilitation strategies and improving patient outcomes. Methodology: A randomized controlled trial design was used in this study to investigate the effectiveness of increasing intensity of task-oriented strength training exercises for enhancing upper limb function in individuals who have experienced a stroke. The tools used to measure improvements in upper limb function included the Action Research Arm Test (ARAT), the Barthel Index Scale, and a goniometer. Results: The study evaluated the effectiveness of an intervention on upper limb muscle strength, motor function (ARAT), and functional independence (Barthel Index) using independent and paired t-tests. The mean age among 30 participants was 51.31. Males comprised 60% in the control and 53.33% in the experimental group. Ischemic stroke was more prevalent (86.67% control, 80% experimental). In the experimental group, significant improvements were found in multiple muscle movements with p-values < 0.05, such as shoulder adduction (p = 0.0001), elbow flexion (p = 0.0000), and finger flexion (p = 0.0000). ARAT subtests also showed highly significant improvements (Grasp: p = 0.0000, Grip: p = 0.0000). The Barthel Index improved significantly in the experimental group (p = 0.034) but not in the control group (p = 0.065). These results confirm the intervention’s positive impact for the post stroke patients. Conclusion: Increasing the intensity of task-oriented strength training exercises results in significantly greater improvements in arm function among stroke survivors. These findings support the integration of higher-intensity protocols into upper limb rehabilitation programs post-stroke to enhance functional recovery. Keywords: Stroke, task-oriented training, upper limb function, strength training, exercise intensity.