Should I do shrugs with back or shoulders?

Related questions

1. Are shoulder shrugs push or pull?
2. Are shrugs back or shoulders?
3. How often should I train traps?
4. Are upright rows bad for your shoulders?
5. What exercises strengthen the trapezius?
6. Do shrugs work traps?
7. What is the best exercise for traps?
8. Do shrugs build shoulders?
9. Are shrugs effective?
10. Is it bad to roll your shoulders when doing shrugs?

Tags

1. #choice
2. #train
3. #after
4. #logic
5. #might
6. #following
7. #conversely
8. #reason
9. #middle
10. #since
11. #exercises
12. #makes
13. #shrugs
14. #shoulders
15. #traps
16. #wisest
17. #warmed
18. #ready
19. #upper
20. #involved
21. #sense
22. #doing