Seal exercise animation (Female)

Seal

Target muscle
—
Equipment
Body weight
Body part
Waist
Type
Stretching

The Seal is a prone spinal extension stretch where you lie face-down and press your torso up onto straight arms, lengthening the rectus abdominis and hip flexors while the erector spinae actively extend the spine. It is commonly used to decompress the lumbar spine, restore range of motion after prolonged sitting, and counterbalance forward-flexion-heavy training.

How to do the Seal

  1. 1Lie face-down on the floor with your legs straight and the tops of your feet flat against the ground, hip-width apart.
  2. 2Place your hands flat on the floor directly under your shoulders, fingers pointing forward.
  3. 3Press your hips and the tops of your feet firmly into the floor to anchor your lower body.
  4. 4On an exhale, straighten your arms and press your torso up, lifting your chest and abdomen off the floor while keeping your hips grounded.
  5. 5Allow your lower back to extend naturally — do not force the range; go only as far as feels comfortable without pain.
  6. 6Draw your shoulders back and down, away from your ears, to keep the chest open.
  7. 7Hold the top position for 20–30 seconds, breathing slowly and letting the abdominals and hip flexors relax into the stretch.
  8. 8To release, bend your elbows and lower your torso back to the floor under control.
  9. 9Rest briefly, then repeat for the target number of sets.

Form tips

  • Keep your hips pressed down throughout — lifting them off the floor shifts the extension into the mid-back instead of the lumbar spine where the stretch is intended.
  • Let your lower back muscles do the work of extension; think of lifting your sternum up and forward rather than pushing your hands down to hike yourself up.
  • Relax your glutes during the hold — clenching them limits lumbar extension and reduces the effectiveness of the stretch.
  • Breathe steadily and let your abdomen release with each exhale; tension in the core limits how deeply the anterior structures can lengthen.

Common mistakes

  • Lifting the hips off the floor — this unloads the lumbar stretch and places unnecessary stress on the lower back by collapsing it rather than extending it evenly.
  • Shrugging the shoulders toward the ears — this creates neck tension and closes off the chest; pull the shoulder blades back and down before pressing up.
  • Forcing range of motion beyond comfort — the Seal is a passive stretch; pushing past a sharp or pinching sensation in the lower back can aggravate lumbar joints or discs.
  • Holding the breath — shallow or suspended breathing keeps the abdominals contracted and limits the depth of the anterior stretch; exhale deliberately to relax into the position.
  • Bending the elbows throughout the hold — soft elbows reduce the lever arm and make it harder to maintain the extended position; straighten the arms fully unless a modified range is needed.

Frequently asked questions

What muscles does the Seal stretch target?

The Seal primarily stretches the rectus abdominis (the muscle running along the front of your abdomen) and the hip flexors. The erector spinae — the muscles running along either side of the spine — contract actively to produce and maintain the back extension. Secondary tension is felt through the anterior hip capsule and the fascia of the anterior trunk.

What is the difference between the Seal and Cobra pose?

The two movements are nearly identical. Cobra pose (bhujangasana) from yoga is typically held with the elbows slightly bent and emphasizes a gentle, mindful extension. The Seal is the same prone extension performed with arms fully straight, which creates a deeper arch and a stronger stretch through the front of the torso. Both are suitable for most people; the Seal simply demands a greater range of motion.

Is the Seal safe if I have lower back pain?

For many people with non-specific lower back pain, prone extension stretches like the Seal provide relief by counteracting prolonged flexion. However, if you feel a sharp, pinching, or radiating pain during the movement — especially down one leg — stop immediately and consult a healthcare professional. People with lumbar stenosis or certain disc conditions may find extension-based movements uncomfortable and should get clearance before attempting this stretch.

How long should I hold the Seal stretch?

For a static stretching effect, hold each repetition for 20–30 seconds and perform 2–3 sets. If you are using the Seal as part of a warm-up or mobility routine, shorter holds of 5–10 seconds repeated 8–10 times can help restore extension range of motion without overly fatiguing the erector spinae.

Can I do the Seal stretch every day?

Yes, daily practice is appropriate for most healthy individuals. The Seal is a low-load stretch with no significant recovery demand, making it well-suited for use at the end of a training session, during a mobility routine, or after long periods of sitting. If you feel soreness or joint discomfort the following day, reduce the hold duration or frequency and reassess your range of motion.

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