Yes, in a traditional Dojo this falls into Hojo Undo, or Supplementary Training. It is still done in very traditional Dojo's. You can see the Tetsugeta at this Tsunami Dojo Web Page as well as the other equipment used for this training. I do not do high kicks, not because I cant, but because they do not make sense in a combat situation. However, what would be the purpose of doing high kicks if you could not use them no matter the clothing?
Paul Hart