Seeing your muscles work: biofeedback may boost hamstring training

This study tests whether adding visual feedback of muscle activity (EMG biofeedback) to hamstring exercises makes training more effective. Healthy, active adults aged 18–40 will complete a 5-week training program using a special device called the Hamshell. Half the participants train with real-time feedback on muscle activation, while the other half train without it. Researchers measure changes in muscle strength, activation, and flexibility to see if feedback leads to better results, with the goal of improving injury prevention methods.