To obtain direct feedback about muscle activity for relaxation training, which technique is used?

• A. EMG feedback
• B. EEG feedback
• C. GSR feedback
• D. Heart rate feedback

Answer: (A)

Muscle activity is tracked directly through EMG biofeedback, which provides real-time information about how tense your muscles are. Surface electrodes detect the electrical signals your muscles produce when they contract. The stronger the contraction, the higher the EMG reading, and this feedback helps you learn to reduce tension during relaxation training. By watching or listening to the EMG signal drop as you relax, you develop the ability to control and lower muscle activity.

Other feedback types focus on different systems: EEG feedback measures brain waves, not muscle activity; GSR (skin conductance) reflects skin moisture and arousal; heart rate feedback tracks cardiovascular responses. While these can support relaxation in other ways, they don’t give direct readouts of muscle tension like EMG does.