Pilates Movement Monday: Pilates Knee Stretch

Client performing knee stretch on Reformer, demonstrating controlled spinal alignment and core engagement

The Knee Stretch on the Reformer is one of those exercises that looks simple, feels demanding, and quietly reveals everything about how someone moves. Traditionally taught with a rounded spine, it has evolved over time to include a neutral position, giving us two very different but equally valuable approaches.

The Traditional Rounded Back

In its original form, the Knee Stretch was performed with a deep spinal flexion. The spine is rounded, the abdominals are strongly engaged, and the focus is on drawing the carriage in using the centre rather than the legs.

This version emphasises control and connection. The rounded shape helps activate the deep abdominal muscles and encourages the client to lift through the back rather than collapse into the shoulders. The pelvis is tucked slightly, creating a strong relationship between the ribcage and pelvis.

When taught well, this version develops:

• Deep abdominal activation

• Spinal flexion control

• Awareness of the centre initiating movement

The key is that the movement comes from the trunk, not from pushing with the legs. If the carriage moves but the spine changes shape, the purpose is lost.

The Shift Towards Neutral

More recently, many teachers have introduced a Pilates neutral spine variation. In this version, the natural curves of the spine are maintained, and the focus shifts slightly from flexion to stability.

The pelvis remains in a more neutral position, and the spine is long rather than rounded. The abdominals are still active, but the emphasis is on stabilising the trunk while the legs move the carriage.

This approach reflects a broader understanding of movement and function. In daily life, we rarely move in a fully rounded position, so training in neutral can feel more transferable.

The neutral version develops:

• Lumbo-pelvic stability

• Functional strength through the hips and legs

• Control of the spine under movement

It also challenges clients who tend to grip or over-flex, giving them another way to organise their body.

What Matters Most

The debate is not about which version is right. It is about understanding what you are trying to achieve.

The rounded version teaches connection and deep control.The neutral version teaches stability and functional movement.

Both are valuable. Both can be taught badly.

What matters is clarity of intention. If you are teaching the rounded version, maintain the shape and initiate from the centre. If you are teaching neutral, maintain alignment and avoid drifting into extension or collapsing into the shoulders.

Teaching Considerations

Whichever version you choose, the same principles apply.

The shoulders must remain supported and not sink.The spine must stay consistent throughout the movement.The carriage should move smoothly, without momentum.

And perhaps most importantly, the client should understand why they are doing it.

Pilates Final Thought

This is a perfect example of how the Pilates method evolves without losing its roots. The traditional rounded Knee Stretch still has enormous value, but the addition of neutral gives us more options and more relevance for modern movement.

It is not about replacing one with the other. It is about knowing when and why to use each.

And, as always, the exercise itself is not the goal. The goal is what it teaches the body.