Purna Bhujangasana, or Full Cobra Pose, fully straightens the arms to maximise spinal extension, strengthen the posterior chain, open the chest, and stimulate the thyroid and digestive organs. It progresses naturally from basic Bhujangasana (Half Cobra). Suitable for all levels through the step-by-step bent-elbow to full-arm progression.
What is Purna Bhujangasana?
Purna Bhujangasana — known in English as Full Cobra Pose — derives from Sanskrit: Purna (full or complete), Bhujanga (cobra or serpent), and Asana (posture). The word Purna distinguishes this from basic Bhujangasana (Partial Cobra): in the full expression, the arms are completely straightened and the spine reaches its maximum extension — the body rising into a complete cobra arch.
Purna Bhujangasana is the natural progression from foundational Bhujangasana — advancing from a gentle chest lift with bent elbows to a full spinal extension with straight arms, maximum anterior body opening, and deep stimulation of the spinal extensors. It is a critical component of Surya Namaskara and one of yoga’s most important postures for spinal health.
At Habuild, Purna Bhujangasana is taught with progressive spine warming — always beginning with half Bhujangasana before advancing to the full expression.
Benefits
Physical Benefits
- Strengthens the Entire Spinal Extensor Chain
Purna Bhujangasana develops the erector spinae, multifidus, and thoracic extensors through sustained load — building the posterior chain strength that is the most direct antidote to the spinal weakness causing chronic back pain. - Opens the Chest and Improves Respiratory Capacity
Full arm extension and maximum thoracic extension opens the anterior chest completely — expanding the intercostal muscles, stretching the pectorals and anterior deltoids. - Stimulates the Thyroid and Endocrine System
The full neck extension increases circulation to the thyroid and parathyroid glands — valuable for thyroid health and hormonal balance. - Stimulates Digestive Organs
The anterior body stretch and abdominal elongation stimulate the digestive organs — improving gut motility and contributing to overall digestive health.
Mental Benefits
- Uplifts Mood and Energises
The full chest-open, anterior-body-expanded position produces a noticeable mood elevation — particularly combined with slow, full chest breathing during the hold. - Opens the Heart and Cultivates Courage
The full anterior body exposure is one of yoga’s most powerful heart-opening postures, cultivating the emotional openness and physical confidence that daily practice develops.
How to Do Purna Bhujangasana — Step-by-Step Instructions
Key Principles
Key Principles
Three principles: warm up the spine first — always begin with half cobra before the full expression; lead with the chest — the lift initiates from the thoracic spine and sternum; and maintain pelvic grounding — the hips and pubic bone remain on the floor throughout.
Purna Bhujangasana — Step by Step
Step 1: Prone Starting Position
Lie face-down on the mat, legs together, tops of the feet on the floor. Place both hands beside the chest, fingers pointing forward, elbows close to the body.
Step 2: Half Cobra First — Elbows Bent
Inhale and lift the head and chest with elbows slightly bent — half cobra. Hold for two breaths to warm the spinal extensors before proceeding.
Step 3: Press to Full Arm Extension
On the next inhale, press through the hands and straighten the arms fully — lifting chest, ribs, and navel off the floor. The spinal extensors lead the lift; the arms assist.
Step 4: Hips and Pubic Bone Remain Grounded
Check that hips and pubic bone remain on the mat throughout. If they lift, reduce the arm extension — the pelvic grounding is the primary safety check.
Step 5: Shoulders Back and Head Gentle
Draw the shoulders back and down, away from the ears. Allow the head to extend gently back — looking upward without compressing the back of the neck.
Step 6: Hold and Lower to Makarasana
Hold for 5–8 breath cycles. To release: exhale and lower slowly — chest, then forehead. Rest in Makarasana for five breaths between repetitions.
Breathing
Inhale to expand the chest and create the lift. Breathe continuously throughout the hold — expanding the chest forward and upward on each inhale. Short, constrained breaths indicate the backbend exceeds current spinal flexibility.
Preparatory Poses
- Salamba Bhujangasana (Sphinx Pose) — The gentler forearm-supported warm-up before the full cobra extension.
- Shalabhasana (Locust Pose) — Warms the posterior chain in the prone position before the full cobra.
- Marjariasana-Bitilasana (Cat-Cow) — Mobilises the spine before the backbend.
Variations
- Variation 1: Bhujangasana (Half Cobra) — Foundation
Elbows bent, lift to comfortable height. The essential preparatory form that must always precede the full expression. - Variation 2: Purna Bhujangasana (Full Cobra) — Standard
Arms fully extended, maximum anterior body extension — the complete form described in the steps. - Variation 3: Raja Bhujangasana (King Cobra) — Expert
From Full Cobra, knees bend and feet lift toward the head. Requires exceptional flexibility — practise under direct expert supervision only.
Common Mistakes to Avoid
- Using Arm Strength Rather Than Spinal Extensors to Push Up
The chest and spinal extensors initiate the lift — the arms assist. Pushing primarily with arm strength concentrates the extension at the lumbar rather than distributing it through the thoracic spine. - Hips Lifting Off the Mat
The hips must remain grounded throughout. Hips lifting signals that the backbend depth exceeds the current spinal flexibility — reduce the arm extension. - Compressing the Back of the Neck
Look forward and slightly upward rather than throwing the head straight back. The back of the neck should remain long, not compressed.
Who Should Practise?
- Those with Chronic Back Pain and Poor Posture
One of yoga’s most direct and accessible treatments for spinal weakness and thoracic kyphosis — building the posterior chain strength that chronic back pain requires. - Practitioners Building Toward Advanced Backbends
The essential progression between basic Bhujangasana and deeper backbends — developing the spinal extension, shoulder openness, and anterior body flexibility that Ustrasana and Urdhva Dhanurasana require. - Is Purna Bhujangasana Good for Beginners?
Yes — as the natural second step after establishing half cobra, Purna Bhujangasana is both safe and immediately beneficial when the pelvic grounding and chest-led lift are maintained.
Make Purna Bhujangasana a Part of Your Practice
Purna Bhujangasana is yoga’s most versatile prone spinal extension posture — its full arm extension delivering maximum anterior body opening, posterior chain strengthening, thyroid stimulation, and the mood-lifting chest expansion of the complete cobra arch.
Whether working through the half cobra warm-up stage or developing the full straight-arm expression, daily practice produces rapid and measurable improvements in spinal extension, posterior chain strength, and postural awareness.
The most effective way to learn Purna Bhujangasana correctly — with hip-grounding, chest-lead, and neutral neck guidance — is under live expert guidance with Habuild.
Start your 14 day free yoga journey with Habuild, today!
Frequently Asked Questions
1 How long should I hold Purna Bhujangasana?
Hold for 5 to 8 breath cycles per repetition. Repeat 2 to 3 times with rest in Makarasana between each. Always begin with 2 rounds of half Cobra to warm the spinal extensors before progressing to the full expression.
Why do my hips keep lifting off the mat in Purna Bhujangasana?
Hips lifting indicates that the backbend depth exceeds what the current spinal flexibility and posterior chain strength can genuinely support — the arms are pushing the chest higher than the back muscles can maintain with the pelvis grounded. Reduce the arm extension and return to a depth where the hips remain grounded. The full arm extension develops progressively as spinal flexibility increases.
Can Purna Bhujangasana help with thyroid health?
Yes — as a complementary practice. The full cervical extension of Purna Bhujangasana increases circulation to the thyroid and parathyroid glands. It is recommended as a complementary daily practice for thyroid health alongside medical management.
What is the difference between Purna Bhujangasana and Ustrasana for chest opening?
Purna Bhujangasana is a prone backbend — the hip flexors are not in full extension and the lift is limited by the floor contact. Ustrasana is a kneeling backbend — the hip joint is in complete extension, maximally lengthening the psoas and anterior hip alongside the chest opening. For hip flexor shortening specifically, Ustrasana delivers a significantly more complete stretch. For progressive prone backbend development, Purna Bhujangasana is the clearest pathway.
What is Raja Bhujangasana and who should attempt it?
Raja Bhujangasana — King Cobra — is the advanced expression where, from Purna Bhujangasana, the knees bend and the feet lift toward the head. It requires exceptional quadriceps flexibility, deep spinal extension, and shoulder stability. It should only be practiced under direct expert supervision after full Purna Bhujangasana is thoroughly established and comfortable.
Can Purna Bhujangasana improve posture?
Yes — it directly strengthens the thoracic extensors and stretches the anterior chest, reversing the thoracic kyphosis and forward shoulder posture of desk work. Consistent daily practice produces visible postural improvement in the upper back and shoulder position within 4 to 6 weeks.
Who should avoid Purna Bhujangasana?
Those with acute herniated discs, recent abdominal surgery, severe wrist injuries, or uncontrolled hyperthyroidism should avoid the full expression. Those with mild back issues should stay in the half Cobra variation with elbows generously bent and never push into pain.