Non-invasive Vibratory Stimulation for Improving Sensory Feedback and Motor Performance in Athletes with Anterior Cruciate Ligament Injury

What this Trial Is About

Researchers are investigating how non-invasive vibratory stimulation affects muscle activity during knee movements in healthy adults. The study aims to understand motor responses when vibration is applied to the hamstring tendons, focusing on both knee bending (flexion) and straightening (extension) in different muscle contraction types. They hypothesize that vibration will increase activity in the hamstring muscles and decrease activity in the quadriceps muscles during these movements. Participants will perform specific knee movements using an isokinetic dynamometer: concentric and isometric knee flexion and extension. These tasks will be done with and without vibratory stimulation applied to the dominant leg's hamstring tendons. The stimulation device includes two small vibrating boxes attached by an elastic band. The study will compare motor performance between the vibration and no-vibration conditions during a single assessment session. During the study visit, participants will complete the motor tasks in random order while researchers measure knee angles and muscle activity using surface electromyography. The study monitors how vibration influences muscle responses and movement velocity. This single-visit evaluation will provide insights into the immediate effects of vibratory stimulation on knee motor performance in healthy adults.

Non-invasive Vibratory Stimulation of the Knee Muscles for the Improvement of the Somatosensory Input and Motor Performance