Ravelin SG No harm should be done to the body initially but it may enlarge your joints just a wee bit more plus faster erosion of the cartilage. Stretch and crack by all means especially in the airplane...gotta avoid having deep vein thrombosis (DVT).
true|y03 SG stretch the correct way la.. watch the video on exercise one http://www.backsociety.org.sg/education.htm
Urroh SG I think it is not good for your spine, beware that it might leave you paralysed in the long term..
