Are planks bad for your lower back?

Related questions

1. Why does my back stiffen up when I walk?
2. Is Captain Atom stronger than Superman?
3. Is low plank or high plank harder?
4. Why does my back hurt in the morning?
5. Is cycling bad for your back?
6. Is Climbing stairs bad for lower back?
7. Do Superman's work your back?
8. What type of plank is harder?
9. Is planking everyday good?
10. What is the most efficient exercise?

Tags

1. #health
2. #compresses
3. #against
4. #correctly
5. #spinal
6. #discs
7. #healthy
8. #planking
9. #planks
10. #spine
11. #without
12. #defence
13. #below
14. #exercise
15. #strength
16. #improve
17. #stressing
18. #build
19. #allow