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I agree with you, but could you expand on that a bit more?? That is, the different ways we sit, how long we sit... are there any any studies or papers on this at all? Henry*** >From: Andrew Kerr <[log in to unmask]> >Reply-To: - for physiotherapists in education and practice ><[log in to unmask]> >To: [log in to unmask] >Subject: Re: why is sitting bad?? >Date: Thu, 26 Jul 2001 14:31:51 +0100 > >It all depends how you sit > > >>> [log in to unmask] 07/26/01 02:03pm >>> >To all: > >Here is a recent post published on forum at rehabedge with regards to the >belief that sitting is bad for posture. It was posted by MCAP. > >"Group: >Here is a question for you. I am hoping for controvesy. > >PTs walk around and preach to the world how bad sitting is for your back. >But is it really? What is this based on?? > >I think that the propagation of this myth resulted from Nachemson's >research >back in the 70s. During his studies, he determined (in vivo) that the disc >pressure was higher in sitting than in standing. These experiments were not >repeated because they involve inserting a catheter with a pressure sensor >into someone's disc and then having them perform various activities with >the >catheter sticking out. >So everyone grabbed the information and began preaching to everyone about >the horrors of the modern office and the consequences of sitting down > >However, a study was performed recently that casts doubt upon this >assertion. Wilk, et al. recently did a one subject study. The subject was >actually one of the researchers (I don't think they could get IRB approval >to use outside subjects!). But in any case their data was similar to >Nachemson's EXCEPT sitting vs. standing. They found higher disc pressure in >relaxed standing .5 MPa than in sitting unsupported .46MPa and than in >"nonchalant" (relaxed) sitting .3MPa. > >Now this study certainly had limitations but on the other hand - the >equipment to collect the data was more accurate and sophisticated. > >This brings me back to my point.......Why is sitting so bad???????? I would >actually contend that it isn't. The fact that most people sit all day is >why >they associate it with pain. If everyone had to stand all day we would be >hearing about how difficult it is to stand and how bad standing is for you. > >Some patients are individually worse in sitting. But many are worse in >standing as well. My pointis that the best thing for the spine is movement >and variety. Sitting, in and of itself, is not inherently bad. > >Here is the cite; Spine 1999 Apr 15;24(8):755-62. New in vivo measurements >of pressures in the intervertebral disc in daily life. > >Fire away people....." > > >What are people's thoughts? > >Henry*** > > >_________________________________________________________________ >Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp