The way Sharon Butler talks about myofascial adhesions in her book {in most libraries} and her online RSI programs, is that it can also be a sticky tissue issue. {try to say that 3 times -LOL}

http://www.selfcare4rsi.com/fascia.html
http://www.selfcare4rsi.com/thoracic...-syndrome.html

That is why she strongly advocates drinking lots of water and gentle stretching techniques to loosen those sticky tissues.

The deep breathing using the diaphragm aids with oxygenation, relaxation, and helps to release toxins during the complete exhale process. I'm sure it may aid with a stretching to some of the internal tissues with a full inhale.

For more info on proper diaphragm breathing see these-

http://www.pe2000.com/breathe_diaphragm.htm
http://www.alexanderworks.org.uk/breathing.html
http://www.cchs.net/health/health-in...asp?index=9445
http://www.swamij.com/diaphragmatic-breathing.htm