The terminology of the category of cross training is somewhat deceiving. To achieve a perfect shoe it must really be developed under one or two basic principles of consumer usage. Is it for court use? Or is it for running use? While the former needs a shoe that is capable of taking movements in many directions, the latter is forward motion oriented where lateral and medial sole protection of the shoe is not so important. At ASICS we work with the 80/20 principle. Put simply, the shoes have either been developed 80% for court usage or 80% for running. The consumer can work out which aspect is most applicable for their activities and choose a shoe accordingly. The wearers’ “Activity Split” was the major focus in development of ASICS’ cross training shoes.