Explain hold-relax technique in PNF stretching.

Explain hold-relax technique in PNF stretching.

• A. The muscle lengthens rapidly
• B. The target muscle performs an isometric contraction against resistance; then the muscle is relaxed, allowing a deeper passive stretch.
• C. The muscle shortens through concentric contraction
• D. The practitioner performs manual traction

Answer: (B)

Hold-relax uses an isometric contraction of the tight muscle, held against resistance, followed by a relaxation that allows a deeper passive stretch. The key idea is that tensing the muscle without changing its length stimulates the Golgi tendon organs, which help reduce the muscle’s resistance when you relax. After the isometric hold, you briefly relax and the therapist moves the limb farther into the stretch, increasing range of motion. This sequence—isometric hold, then deeper stretch—is what enables the deeper passive stretch. The other ideas described don’t reflect this mechanism: rapid lengthening isn’t how hold-relax works, concentric shortening isn’t the contracted action used, and simply applying traction without the targeted isometric hold won’t leverage the same reflex relaxation.

Hold-relax uses an isometric contraction of the tight muscle, held against resistance, followed by a relaxation that allows a deeper passive stretch. The key idea is that tensing the muscle without changing its length stimulates the Golgi tendon organs, which help reduce the muscle’s resistance when you relax. After the isometric hold, you briefly relax and the therapist moves the limb farther into the stretch, increasing range of motion. This sequence—isometric hold, then deeper stretch—is what enables the deeper passive stretch. The other ideas described don’t reflect this mechanism: rapid lengthening isn’t how hold-relax works, concentric shortening isn’t the contracted action used, and simply applying traction without the targeted isometric hold won’t leverage the same reflex relaxation.