I am currently practicing Goju-Ryu, and I can assure you, Sanchin, if done properly and not abused, can help you in many ways (breathing, stomach strenght..ect...ect...ect..)But...yeah...Sanchin and Goju-Ryu isn't as bad as people think it to be..Oh, and hobbitbob has made a good point. Goju Ryu means "Hard and Soft"...Sanchin represents the harder part of Goju-Ryu and Tensho is the softer part of this system...But anyway, Im sure you all knew that lol And it is a good idea to practice them together.