What is harder Half Ironman or marathon?

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Tags

1. #harder
2. #being
3. #walking
4. #things
5. #because
6. #running
7. #slowtwitch
8. #normal
9. #forum
10. #ironman
11. #people
12. #marathon
13. #think
14. #equal
15. #demanding
16. #faster
17. #physically