Partner-Held Back Extension | Friends

Quick Intro

Partner-Held Back Extension works the muscles along the back of the body: the lower back, the glutes and the hamstrings. The working partner lies face down with the hips at the end of a sturdy bench and the upper body hanging over the edge. The anchoring partner holds their ankles firmly. The working partner lowers the trunk toward the floor by bending at the hips, then lifts it back up until the body is in a straight line. Once the working partner finishes the agreed reps, they climb off the bench and take over as the anchor.

It is a fuller-range version of the floor exercise covered at Superman. On the floor, the lift is short. Off a bench, with a partner holding the legs down, the trunk can travel through a full hip hinge, much like a back extension machine.

What You’ll Need

A sturdy, stable weight bench or a similar low, solid surface that will not tip or slide.
A pad or folded towel for the hips, if the edge is hard.

How It Works

Place the bench on a flat, non-slip floor.
The working partner lies face down along the bench so the hip bones are right at the end and the upper body hangs over the edge. The legs stay on the bench.
The anchoring partner holds the working partner’s ankles firmly down onto the bench, either sitting astride the end of the bench behind the feet or standing and leaning over them.
The working partner crosses the arms over the chest or rests the hands lightly by the head.
They lower the trunk slowly toward the floor by bending at the hips, keeping the back long.
They lift back up, squeezing the glutes and lower back, until the head, hips and heels are in a straight line. Then they lower again.
After the agreed number, the two swap.

For the Anchoring Partner

A real anchor. The working partner’s whole upper body hangs off the bench, so the legs must be held down firmly. If the ankles lift when the working partner comes up, hold harder or put more of your weight over them.

Still and steady. Do not pull the legs or rock the bench. The anchor holds; it does not take part.

Watch the top. Tell the working partner if they are arching past a straight line.

Ready to stop. If the working partner says stop, keep the hold until they have lowered down safely and climbed off.

General rules for anchoring are in Stretching, Resisting and Anchoring a Partner.

What the Partner Changes

On the floor, a Superman lifts the chest and legs a short way, and there is no hinge at the hips. With the hips over the end of a bench, the trunk can lower toward the floor and come all the way back up, which works the lower back, glutes and hamstrings through a much bigger range. That only works if something holds the legs down, and the partner is that something.

How Many

Start with 8 to 12 slow reps and swap roles after each set. Two or three sets each is enough for most people.

Making It Easier or Harder

Easier: a smaller range, lowering only part of the way toward the floor. Hands by the hips also makes it easier.
Harder: hands behind the head, a slow count on the way down or a two-second pause at the top.

Staying Safe

Never go past a straight line at the top. Arching high puts strain on the lower back. The aim is a straight body, nothing more.
Use a solid surface. The bench must not tip, slide or flex. Test it before the first rep.
A genuinely firm hold. A weak anchor can let the working partner slide forward off the bench.
Stop for pain in the lower back.

Common Mistakes

Over-arching. The most frequent fault with this exercise. Stop at straight.
Hips too far onto the bench. If the hip bones are on the bench, there is no room to hinge. Slide forward until they are at the edge.
Swinging up. Lift with control and lower slowly.
Light hold. The anchor has to keep the legs completely still.

Getting Better Over Time

Add slow reps before anything else. A pause at the top, held for two seconds in a straight line, is a good next step once 12 smooth reps feel easy.

Fitting It Into a Session

Pair it with a front-of-body core exercise such as Partner Sit-up with Feet Hold, so both sides of the trunk get worked. Each partner rests while anchoring.

Superman is the floor version, with no equipment and no partner needed.
Reverse Hyperextension keeps the trunk still and lifts the legs instead.
Partner Hip-Hinge Nordic Curl uses a firm ankle anchor for the hamstrings.

FAQ

Is this the same as a back extension machine?

It works in a very similar way. The partner holding the ankles does the job of the machine’s ankle pads.

How high should I come up?

Until your body is straight from head to heels. Going higher arches the lower back without adding anything useful.

Can I use a sofa or table?

Only if it is solid, stable and the right height. A proper bench is safer.