Mobility

Open Book Rotation

A side-lying rotation where the top arm sweeps open like a book cover, gently rotating the upper back while the hips stay stacked. A favorite for desk-bound upper backs and post-lifting stiffness.

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Suggested use

Sets

Reps

6-8 per side

Rest

20s

Mobility

Beginner

Mobility

Rehab

Recovery

Rotation

Rehab-friendly

Muscles worked

Primary

Obliques

Secondary

Chest

Erector spinae

Rear delts

Equipment

No equipment needed - just your body.

How to do it

Lie on your side with knees bent and stacked at hip height, arms extended together in front of your chest.
Keep the knees pressed lightly together — they stay put for the entire movement.
Sweep your top arm up and over toward the floor behind you, following the hand with your eyes.
Let your chest open toward the ceiling while your hips stay stacked on their side.
Pause where you feel a comfortable stretch across the chest and mid-back.
Sweep the arm back to the start with the same control, then finish the set and switch sides.

Common mistakes

Letting the top knee lift, which turns spinal rotation into hip rotation.
Whipping the arm over instead of sweeping it slowly.
Forcing the hand to touch the floor behind you on day one.
Forgetting to let the head and eyes follow the moving hand.

Safety first

Rotate to comfortable tension only — range usually opens up over a few reps.
Rest your head on a cushion to keep the neck relaxed.
If you have a spine condition or recent rib or shoulder injury, consult a licensed clinician before adding rotation work.

Who should avoid or modify

Recent spinal, rib or shoulder surgery — consult a licensed clinician first.
Acute rib or mid-back pain that sharpens with rotation.
Later stages of pregnancy — comfort in side-lying varies; seek individualized guidance.

Not medical advice

Rehab-style movements are general wellness exercises, not treatment. If you are recovering from an injury or surgery, are pregnant, or manage a chronic condition, consult a licensed clinician (physiotherapist or doctor) before performing them. Alblooshi Fit does not diagnose, treat, or cure any condition.