Are planks the best core exercise?

Related questions

1. Why does my back hurt every morning?
2. Do Superman's work your back?
3. What type of plank is harder?
4. Is low plank or high plank harder?
5. Do Superman's work your abs?
6. What weight can Superman lift?
7. Can I do lower back exercises everyday?
8. Is working out 30 minutes a day enough to lose weight?
9. Is Climbing stairs bad for lower back?
10. Why does my back stiffen up when I walk?

Tags

1. #killer
2. #abdominus
3. #stomach
4. #including
5. #works
6. #transverse
7. #routine
8. #seven
9. #plank
10. #combine
11. #toned
12. #muscles
13. #internal
14. #exercises
15. #external
16. #obliques
17. #workout
18. #rectus
19. #because