Comparative Effects of Different Focus Methods on Muscular Activation During Single-Leg-Squat Exercise

Background: Single-leg squats are frequently featured in training and rehabilitation programs. The use of focus during exercise changes the state of concentration during exercise. This causes changes in muscular activity. No study has been found comparing focusing methods’ effectiveness during single-leg squat movement. Aim: This study aims to compare the changes in lower extremity muscular activations in cases of external focus, internal focus, and absence of focus. Methods: The muscular activities (Gluteus Medius, Vastus Lateralis, Vastus Medialis, Rectus Femoris, Biceps Femoris, and Semitendinosus) of the healthy participants included in the study were measured with the surface electromyography (EMG) device. External focus, internal focus and without-focus positions were used. Results: Seventeen recreationally active participants were included in this study. The muscular activities of the participants, which occurred in three different situations, were measured with the surface electromyography (EMG) device. While the quadriceps were more active in the descent phase, the hamstring muscle group was more active in the ascent phase. The external focus provided more muscular activation than the other two focal conditions. Conclusion: According to the results of this study, the use of focus during single-leg squat training and rehabilitation may change the muscular response obtained.