Hello, fellow organists!

I just wanted to start a discussion on the topic of organ playing and
herniated discs. Are the two related? Any solid data on the
subject?

Just two days ago I had my operation, and now I am trying to figure
out what caused the injury in the first place. An organist friend,
who BTW also suffers from the same condition, just told me that this
trouble comes from practicing the organ; after all, all that sitting
on the hard bench, moving your feet and trying to get to the swell
manual that it placed way too high must be detrimental to one's
health. Just wanted to hear opinions of colleagues.