PNF Supine Hamstring Stretch | Friends

Quick Intro

PNF Supine Hamstring Stretch uses contract-relax stretching, a method common in sports treatment rooms, on the hamstrings. The stretching partner lies on their back with one leg raised straight. The helper kneels beside them and holds the raised leg at the calf and ankle, at the point where the stretch begins. The stretching partner then pushes the leg gently back against the helper’s hold for five or six seconds without it moving, relaxes completely, and on their go-ahead the helper guides the leg a little further. Two or three rounds, then swap legs and swap roles.

The basic lying hamstring stretch is covered at Supine Hamstring Stretch. This guide covers the contract-relax method and the helper’s job, which a person cannot do for themselves.

What You’ll Need

A mat for the stretching partner to lie on.
Room for the helper to kneel beside them.

How It Works

The stretching partner lies on their back, both legs straight. The leg that is not being stretched stays flat on the floor throughout.
The helper kneels beside the leg to be stretched and lifts it, keeping it straight, holding the back of the calf and the ankle.
The helper raises the leg slowly until the stretching partner says “there”, where they feel a clear but comfortable stretch. The helper holds it there.
Contract. The stretching partner pushes the leg back down against the helper’s hands, gently, for five or six seconds. The leg does not move; the helper simply holds.
Relax. The stretching partner lets the leg go completely loose and breathes out.
Deepen. When the stretching partner says “OK”, the helper guides the leg a small amount further, to the new point of clear but comfortable stretch, and holds it there.
Repeat steps 4 to 6 two or three times.
Lower the leg slowly, swap legs, then swap roles.

For the Partner Helping

The hold. Support the leg with one hand behind the calf and the other behind the heel or ankle. Keep the knee straight without pressing on the kneecap. Your hands should be still and solid, like a wall.

During the push. You do not push back harder. You hold the leg where it is. If the stretching partner pushes so hard that you have to fight them, ask them to push more gently.

After the relax. Wait for the stretching partner’s go-ahead before moving the leg. Then move it slowly by a small amount and stop as soon as they say “there”.

Keeping it straight. Let the leg travel straight up toward the ceiling and back toward the head, without twisting to the side. Watch that the other leg stays flat on the floor and the hips stay down.

The general rules for hands-on stretching are in Stretching, Resisting and Anchoring a Partner.

How Hard to Push

The push in the contract phase is mild, well under half of the stretching partner’s strength. It is not a strength contest and not a leg press. A gentle push is enough to let the muscle relax afterwards; a hard one tires the leg, makes the hold harder to control and makes the next step deeper riskier.

What the Partner Changes

A strap or a towel can hold the leg for a basic stretch, but contract-relax needs someone to hold the leg still against the push and then move it on the go-ahead. That is why this method is mostly done with a partner. Done well, the leg usually goes a little further after each round than a simple hold allows.

Staying Safe

Never force the leg further after the relax without a clear go-ahead.
Keep the push mild, under half strength.
Stop for sharp pain, or a pulling, spreading feeling behind the knee or down the leg.
Keep the other leg down. If the hips lift off the floor, the stretch has moved out of the hamstring.

Common Mistakes

Pushing too hard. More push feels like more stretch. Keep it gentle.
Moving the leg during the push. The leg should stay exactly where it is during the contract phase.
Big jumps after the relax. Small steps. The aim is a little further each round.

Fitting It Into a Session

Contract-relax stretching suits the end of a session, when the muscles are warm. It is a good finish after hinging, sprinting or deadlift games.

Assisted Standing Hamstring Stretch stretches the same muscles standing, with a heel on a step.
Partner Shoulder PNF Stretch uses the same contract-relax method on the shoulder.
Supine Hamstring Stretch with Strap is the solo version, with a strap in place of a partner.

FAQ

What does PNF mean?

It stands for proprioceptive neuromuscular facilitation, a family of stretching methods that use a short muscle contraction before a stretch. Contract-relax is the one used here.

How many rounds should we do?

Two or three per leg. After that the gains are small.

Should the stretching partner hold their breath during the push?

No. Breathe normally during the push, then breathe out as you relax.