With this type of zorb soccer in usa, one relaxes the muscles he is trying to stretch and relies on the external force to hold them in place. You do not necessarily have to work very hard so as to do a passive stretch but there is always a risk that the external forces may be stronger than you are flexible which might result in injuries. http://www.zorbsoccer.us/
zorbsoccer has no projects yet
Take a look at our success stories page to see great projects that have been completed on Twine.