In the muscle energy technique context, which option describes 'Post isometric relaxation (PIR) muscle energy technique'?

• A. Muscle energy technique
• B. Post isometric relaxation (PIR) muscle energy technique (MET)
• C. Hold relax stretch
• D. Reciprocal inhibition stretch

Answer: (B)

Post isometric relaxation uses a brief isometric contraction of the target muscle at its end range, then allows relaxation followed by a passive stretch. This sequence taps the Golgi tendon mechanism to reduce muscle spindle activity and alpha motor neuron drive, making the muscle easier to lengthen and increasing range with less resistance. It’s a specific application within muscle energy techniques, distinct from other stretching approaches that rely on different contraction patterns or muscle group involvement. So the description that matches PIR MET is the one that names the post‑isometric relaxation muscle energy technique.