What muscles do Russian twists work?

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Tags

1. #bodybuilders
2. #russian
3. #smaller
4. #muscles
5. #obliques
6. #twists
7. #tapered
8. #women
9. #often
10. #waist
11. #fitness
12. #seeking
13. #neglected
14. #fanatics
15. #rotate
16. #torso
17. #obsessed