Half of the children within each class were randomly allocated to the Taekwondo experimental trial group and the other half to the control group. The experimental group received two 45-minute ...

Correspondence to: Dr Zetaruk Pediatric Sports and Dance Medicine Program, Children’s Hospital ... varied according to style: 59% tae kwon do, 51% aikido, 38% kung fu, 30% karate, and 14% tai chi.