Compass pose — Parivrtta Surya Yantrasana, "revolved sun dial pose" — is one of those postures that looks like a magic trick: seated, one leg extended up and over the shoulder, torso twisting and sidebending away, top arm reaching overhead. It photographs beautifully and humbles almost everyone. The honest news: compass is less a single pose than a graduation test for three separate capacities. If your hamstrings, hip external rotation, and side body aren't already warm from years of practice, the pose will politely decline, and no amount of hauling on your own leg will persuade it. That's fine. The preparation is genuinely useful, and the early versions are real poses in their own right.
What compass actually asks for
- Very mobile hamstrings on the lifted leg — the leg must straighten while the hip is flexed deeply, the demand of half splits and then some.
- Deep hip external rotation and flexion — the knee has to travel up behind the shoulder, which is the territory of fire log pose.
- A long, supple side body — the full pose is as much a sidebend as a hip opener; the obliques and lats on the bottom side do real work.
- A spine that twists willingly — the torso rotates away from the lifted leg throughout.
Warm up properly before attempting any version: several rounds of sun salutations, then seated hamstring work and a gentle twist. Attempting compass cold is how hamstring attachments get grumpy — see hamstring anatomy for why the sit-bone end of that muscle deserves respect.
Step one: cradle the leg — the hip opener
How: Sit tall, knees bent, feet on the floor. Lift your right leg and cradle it — shin in the crooks of your elbows, or forearm under the calf if that's too far. Rock the leg gently side to side, like a baby, keeping the chest lifted rather than slumping backward. Thirty seconds per side. If the right hip grumbles sharply in the socket, stop there today and work on pigeon instead.
Why: This is the honest test of hip mobility for compass. If you can't comfortably cradle the leg, the full pose isn't on today's menu — and cradle work alone will move you toward it.
Step two: knee behind the shoulder — with the hand planted
How: From the cradle, release the leg, lean slightly forward, and work the right knee as high up the right arm as it will comfortably go — ideally toward the back of the shoulder. Plant the right hand on the floor outside the right hip, fingers spread, and press down firmly. Now extend the left leg out to the side, foot flexed. Sit tall. Stay here for five to eight breaths, pressing the hand down and lifting through the crown.
Why: This is the pose's real foundation — most of the benefit and most of the challenge. The planted hand anchors the twist; the lifted chest keeps the low back out of the negotiation.
Step three: the full pose — Parivrtta Surya Yantrasana
How: From step two, reach the left arm up and over the ear, palm turning toward the floor beyond the right foot, and begin to straighten the right leg — pressing it back into the shoulder as you do, so the leg and arm resist each other. Turn the chest open toward the ceiling, gaze up under the left arm. Straighten the leg only as far as the hamstring offers without protest. Two or three breaths is a full serving. Release slowly, bend the knee, and switch sides.
Why: The opposition — leg pressing into shoulder, shoulder pressing back — is what makes the pose stable rather than a collapse into flexibility. You're building a structure, not draping yourself into a shape.
Versions for the rest of us
- Keep the lifted knee bent. A bent-knee compass with the arm overhead is a deep, complete sidebend. Many long-time practitioners work here permanently.
- Use a strap. Loop a strap around the lifted foot and hold it with the top hand — it lengthens the reach without yanking the shoulder out of its socket. See the props guide if you're strap-agnostic.
- Skip the shoulder entirely. Sundial pose — sundial pose — is compass's friendlier sibling: the leg extends to the side without going over the shoulder. Same hamstrings, same side body, less shoulder choreography.
Safety notes: Pulling sharply at the sit bone or behind the knee means back off — hamstring attachment injuries take months to calm down. Knee pain in the lifted leg is a stop sign, full stop; the hip, not the knee, should supply the rotation. Skip this pose entirely with hamstring tears, hip impingement pain, or SI joint irritation, and ask a physiotherapist before returning. Forcing a leg over your shoulder has never once opened a hip faster.
Compass rewards the long approach: months of honest hamstring and hip work, then one day the knee slides up the arm and the pose simply happens. That's the pattern with most "advanced" poses — they're not achieved so much as arrived at, and the arriving is the practice.