What is under a gymnastics floor?

Related questions

1. What size is a gymnastics floor?
2. Do rubber mats damage hardwood floors?
3. How thick should gym mats be?
4. What is the difference between a Pilates mat and a yoga mat?
5. Can you put gym mats on carpet?
6. What is a tumbling mat?
7. What is the best thickness for yoga mats?
8. Are exercise mats and yoga mats the same?
9. Are yoga mats good for sit ups?
10. What is a landing mat?

Tags

1. #gymnastics
2. #impact
3. #height
4. #tumbling
5. #spring
6. #springs
7. #bouncy
8. #which
9. #rubber
10. #gymnast
11. #enable
12. #landings
13. #floors
14. #plywood
15. #floor
16. #combination
17. #contain
18. #competitive
19. #soften