Why do shoulders get knots?

Related questions

1. Are traps shoulders or back muscles?
2. Why are my shoulders hunched forward?
3. Are shrugs a good exercise?
4. What causes old lady hump?
5. Why are my shoulders tense?
6. How should I sleep to correct posture?
7. Why are my shoulders so tense?
8. How should I sleep to improve my posture?
9. Can stress cause shoulder blades?
10. Are shrugs good for you?

Tags

1. #makes
2. #source
3. #triangle
4. #middle
5. #stress
6. #muscle
7. #muscles
8. #often
9. #posture
10. #tension
11. #trapezius
12. #common
13. #shape
14. #shoulder
15. #headaches
16. #occur
17. #knots