I have a strong and personal opinion on this subject.
Many years ago I developed sciatica. It was quit painful and debilitating. At the time I was teaching, spending as much as 6 to 8 hours sitting at a desk grading papers and writing course materials, but also tuning and doing a lot of bike training for an up-coming long ride.
When every book in the bookstores prescribed similar advice, advice that seemed to be making my problem worse I took it upon myself to find the problem and fix it.
I was teaching medical physiology, so I decided to look at the problem logically. Sitting at a spinet, sitting at a desk and sitting on a bike all put your back in a similar bent posture. With the spine curved forward in a typical sitting position your disks are stressed into a wedge shape. In that position and shape they eventully bulge outward... and into your spinal cord (the cauda equina in the lower lumbar area). Any stretching exercises in the forward direction tends to increase the stress on disks; and this is just what almost every back book (written by distinguished medical professionals) was recommending.
I stopped sitting. I bought several ergonomic kneeling chairs, set my car seat back a couple of notches, learned to sleep straight, redesigned my bike to be more upright and started tuning standing whenever possible (I try to avoid spinets).
This was about 27 years ago, and since then I have not had any serious back trouble. I do occasionally feel a twinge of sciatica, but this is always due to too many spinets or spending time in regular chairs.
I am not saying that this is the magic cure for all back problems, but I still can't find many medical books recommending that you avoid sitting (the Mayo Clinic did recommend not sitting, but mostly because of inactivity) and most of the people with serious back trouble I know have spent careers sitting in chairs.
I have been very lucky not to have any repetive stress issues with tuning (I regularly use my own artificial finger/thumper/key pounder) and I believe that most problems can be reasoned out and solved with a bit of common sense.
And PLEASE, use ear protection!
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Blaine Hebert RPT
Duarte CA
(626) 390-0512
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