Mobility and stretches
Open books
Muscles worked: Upper back · chest

How to do it
- Set up. Lie on your side with your knees bent and stacked, a cushion under your head, and both arms straight out in front of you.
- Move. Keep your knees together and slowly lift your top arm up and over to the other side, turning your chest to the ceiling. Follow your hand with your eyes.
- Finish. Move only as far as is comfortable, then bring the arm back to the start. Finish your reps, then roll over and repeat on the other side.
Common mistakes
- Rolling the hips back with the arm.
- Forcing range.
Where it appears in the member plans
Beginner Reset, Strength Builder, 12-Week Home Plan: Bodyweight, 12-Week Home Plan: Dumbbells or Band, Mobility + Core, Cardio & HIIT.
Log it, and beat it next time
In the member area every exercise has these cues next to your workout log, with last time’s numbers and a suggested target. £9.99 a month on a 12-month plan, or £79 a year, all taxes included.
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