Bob tipped me to this resource, which deals with the necessity of training movement skills in the frontal plane. While it is written with regards to Lacross players, the information can obviously be applied to karate training with very productive results. All of the conditioning exercises shown are a valuable addition to any karate training program for both injury prevention and performance enhancement.
Dr. Brian Paris, DC, CBP Fellow, NASM-PES
Colin Cooley, MS, NASM-PES