how do people sit in bleachers without their back hurting?

https://lemm.ee/post/25434787

how do people sit in bleachers without their back hurting? - lemm.ee

Bleachers have no back support. If I hunch over, my lower back hurts. If I sit up straight, my lower back is fine but my shoulders and upper back hurt.

HEX 2.0 Original Chair

Damn. This guy comes prepared.