I reckon I could touch the floor if I held my gut in, Rory, on most days I still have "full" movement but every movement can cause some pain due to the damage in my back from the dislocation and kapot disks putting pressure on nerves.
As i say, the signs are visible on the spine even on an x-ray. And AnkSpo would not be causing the issues in the hands and wrists which are also being blamed on the osteo.
And, to be honest, I ain't really "too young". I've had a lifetime of working in construction, and that knocks hell out of you, especially when you continuously overdo things because you are "your own worst enemy". The "trigger", as far as my back goes, was a fall from a stepladder over 20 years ago which caused the dislocation and started the degradation of the disks. Add in the punishment the rest of my body has had over the years because of my work and you can see how OA can develop at my age.
As they say, crap happens.