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.
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.
Your posture muscles are mostly around the thoracic spine but are quite complicated. The weight of your head, and shape of your torso have a big impact on how much strain is placed on the muscles that enable posture. The heavier you are up high, the harder posture will likely be. Most people don’t really notice it very much.
In other words, it is mostly muscular endurance and weight.