Appears in
Pairs with
Pose · A
Half Lord of the Fishes
Ardha Matsyendrāsana
One knee up, the other leg folded under, and the torso rotated toward the raised knee. Seated twists are the most popular pose in the whole repertoire and the one where the difference between twisting and yanking is most often ignored.
The shape, with joint angles
The angles are measured on the drawn skeleton and change with the variant you pick. Treat them as a starting reference, not a target to force.
Specification
| Sanskrit | Ardha Matsyendrāsana |
|---|---|
| Also called | Seated spinal twist |
| Level | Intermediate |
| Loads | Spine · Hips · Side body · Neck |
| Props | Mat · Blanket · Block |
| Typical hold | 30 sec |
| Gaze | |
| Published | 8 November 2026 · By The Asana Desk |
Getting in
- 01
Sit on a folded blanket with both legs extended and the pelvis level.
- 02
Bend the right knee and place the right foot flat on the floor beside the left hip, or just outside the left thigh.
- 03
Keep the left leg extended, or fold it under the body if that is comfortable.
- 04
Sit tall and inhale; lengthen the spine before turning anything.
- 05
Exhale and rotate the torso to the right, turning from the ribs rather than from the waist.
- 06
Bring the left arm across and hook it outside the right knee, or rest the hand on the knee; take the right hand to the floor behind you.
- 07
Hold for 30 seconds, breathing into the back ribs, then unwind slowly and change sides.
Working notes
Twisting is a length problem first
| Lever | Effect on the spine |
|---|---|
| Hand on the knee, no pull | The twist comes from the ribs — the safest version |
| Elbow hooked outside the knee, gentle pressure | A useful progression once the spine is long |
| Pulling hard on the knee | The lumbar spine takes the load — avoid |
| Hand behind you pressing into the floor | Adds a second lever; keep it light and use it to stay tall |
A spine that is compressed cannot rotate well, and a spine that rotates without being lengthened rotates at the segment that is least able to protect itself. That is why the sequence is always: sit tall, inhale, lengthen, then turn on the exhale.
The most common version of this pose in a class is a person who has folded forward slightly and is pulling hard on the knee. The pulling produces the sensation of a twist and puts the load into the lower back.
Where the rotation should come from
The thoracic spine rotates; the lumbar spine barely rotates at all. A twist that happens low, at the waist, is a twist happening in the one part of the spine that has almost no rotation available and the most vulnerable discs.
The instruction that produces the thoracic twist is to turn the ribcage and let the pelvis stay where it is. If the pelvis is being dragged around by the twist, the spine is not twisting — the whole body is turning.
Self-checks
- Is the spine still tall, or has the twist become a slump?
- Is the pelvis still facing forward, or has the twist dragged it around?
- Is the chin level, or is the head being turned past its range?
- Can you breathe into both sides of the back ribs equally?
Safety
Skip or heavily modify the pose if any of these apply to you. When in doubt, ask a teacher who can see you move, or a clinician who knows your history.
- Disc injury, sciatica or acute lower back pain: skip the twist or keep it to a few degrees with the hands on the hips.
- Osteoporosis: avoid strong twists; the ribcage should turn only a little.
- Pregnancy: closed twists of this depth are not appropriate; substitute a side bend.
- Recent abdominal or spinal surgery: get clearance before twisting.
- If the twist produces any sharp pain or pins and needles into the legs, stop immediately.
This page is informational only. It is not medical advice and no pose here is a treatment for any condition.
- Sit on a folded blanket to level the pelvis, which is what makes the tall spine possible.
- Hand on the opposite knee with no hooking at all, for the first weeks.
- Bottom leg extended rather than folded under, if the hip or knee objects.
- Chair version: sitting sideways on a chair, turning toward the back of the chair, which is a complete twist with no floor work.
Useful propsMat · Blanket · Block
- A folded blanket under the sitting bones is what allows the spine to be tall enough to rotate.
- A block beside the hip gives the back hand somewhere raised to rest against.
- No strap: this pose should never be pulled into.
- Disc injury, sciatica or acute lower back pain: skip the twist or keep it to a few degrees with the hands on the hips.
- Osteoporosis: avoid strong twists; the ribcage should turn only a little.
- Pregnancy: closed twists of this depth are not appropriate; substitute a side bend.
- Recent abdominal or spinal surgery: get clearance before twisting.
- If the twist produces any sharp pain or pins and needles into the legs, stop immediately.
Inhale to lengthen the spine, exhale to twist; in the hold, send the breath into the back ribs on both sides.
- One breath, one degree: the twist deepens on the exhale, never on the inhale.
- If the breath cannot reach the back of the ribs, the twist has gone too low.
- Unwind slowly on an inhale, and sit for a breath before changing sides.