Percorrer por autor "Filipe, Hugo Manuel dos Santos"
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- Effects of attentional focus on torque regulation and muscle activation in acute anterior cruciate ligament injured individualsPublication . Filipe, Hugo Manuel dos Santos; Vaz, João Pedro Casaca de RochaAttentional focus has been extensively studied in the context of motor learning, demonstrating a significant influence on movement execution and control. However, its effects in populations with anterior cruciate ligament (ACL) injury, particularly regarding torque variability and muscle activation, remain underexplored. This study aimed to examine the effects of different attentional focus strategies (internal vs. external) on torque production and electromyographic activity in athletes with ACL injuries. Eleven participants with ACL injuries performed submaximal isometric knee contractions under internal or external focus instructions, using an isokinetic dynamometer. Variables such as sample entropy (SampEn), torque coefficient of variation (CV), co-contraction index (CCI), and electromyographic activity of the vastus lateralis and biceps femoris were analyzed. Results revealed no statistically significant differences in torque variability between conditions; however, higher levels of co-contraction and hamstring activation were observed under the external focus condition. These findings suggest that attentional focus may modulate motor control patterns in individuals with ACL injuries by influencing neuromuscular compensation strategies throughout rehabilitation. Thoughtful implementation of attentional focus instructions may serve as a valuable component in the optimization of exercise-based rehabilitation protocols.