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Open book stretch for upper back stiffness
After hours at a desk, the middle of your back can feel stiff and locked. The open book stretch is a gentle floor move that rotates your upper back while you lie on your side. It needs no equipment, only a bit of floor space.
Upper back pain is often just a tired, stiff back, but not always. The NHS lists pain in the upper back between the shoulders as a reason to see a GP if it does not ease, and chest pain as a reason to call emergency services. This guide is for ordinary stiffness only.
How to do it


- Lie on your side with your knees bent and stacked, arms straight in front, palms together.
- Lift your top arm and open it like a book, following your hand with your eyes.
- Return slowly. Finish all reps, then switch sides.
Dose: 6 repetitions per side.
Tip: Keep your knees together and let the movement come from your upper back.
Common mistakes
- Letting the knees drift apart or lift. Stacked knees keep the turn in your upper back.
- Forcing the arm to the floor. Open only as far as is comfortable, even if the arm stays in the air.
- Cranking the neck. Let your eyes follow your hand, but keep the neck relaxed.
- Holding your breath. Breathe out as you open.
When to stop and see a professional
Stop and speak to a doctor or physiotherapist if you notice:
- numbness, tingling or weakness in an arm, hand, leg or foot
- pain that spreads (radiates) down an arm or leg
- pain that started after an accident, fall or other injury
- loss of bladder or bowel control, or numbness between your legs (seek emergency care)
- pain that keeps getting worse, wakes you at night, or comes with fever or unexplained weight loss
- chest pain, or pain together with shortness of breath (seek emergency care)
- pain between the shoulder blades that does not ease after a few weeks
Do this with Mo, a 5-minute guided routine app
Mo the sloth guides short daily posture, neck and back exercises, with gentle reminders and a pain check-in. Learn more about Mo.
Related guides
- Chair back opener
- Seated spinal twist
- Desk stretches you can do at work
- Cat-cow stretch for lower back stiffness
- Doorway chest stretch for rounded shoulders
- Shoulder blade squeeze (scapular squeeze)
- Mo: Posture & Back Pain Relief app