Ryan Woodruff, Lynchburg YMCA
We love using vertical kicking to work the legs and practice alignment of the body. The :30 vertical kick is done with the hands out of the water. The :20 is with head on hands (a little more difficult), and the :10 is done in a streamline position (most difficult). There are endless variations and permutations one could make to this structure.
The Swimming Wizard 