Cardio training is not necessary for all martial arts students. Your decision whether to add it to your normal routine will depend largely upon what you want to accomplish. For example, suppose you have enrolled your son or daughter into classes in order to instill within them a level of personal discipline and respect. They may have little need for cardiovascular exercise. On the other hand, if your child shows interest in par » Read more: Improving Your Martial Arts Technique Through Cardio Training