I'm the opposite; I'm 6'1 but my knuckles drag on the floor, and I'm bow-legged...
...the bells, THE BELLS!
You think you've got problems. My avatar is my passport photo.
And who'd have thought firearms were such an issue when people examine your passport...
As to the riser / bike position / back thingmy, well speaking from my own perspective, and experience - from what I see, most, when they age (well towards middle age, anyways, as people head into old age, a fair amount lose weight again) tend to put some weight on, and also are less active and get less exercise (ignoring cycling for a second).
So more bodyweight, less stimulus to the muscles supporting the body.
I'm not about to advocate everybody suddenly go all reinvigorated Arnie, and all, but I genuinely believe some resistance training, where (ideally more, but as a minimum) some safe, but with reasonable demands, exercise(s) are done for the lower back and abdominal area, would see some issues with peoples' backs nothing like as problematic.
That's no panacea - some people have other complications with their backs, but for a good proportion at least, it's a case of more weight, less muscular development and strength, therefore more aches and pains. For many, some mild, safe, exercise to work at least the lower back (and back in general) plus abdominal area, would probably ease a lot of peoples issue with what they perceive as age-related back ache.
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