Switch from snowboard to ski: leg trouble

A snowboard trainer warned me that switching from board back to ski sometimes causes trouble. On a board you're constantly shifting your weight from the front to the middle of the board. This means that on a board both legs are used differently: leaning more on the front leg than on the hind leg. On ski's this should not happen: both legs should be used the same!

After 3 weeks of intensive snowboard training I switched back to skiing. The result seemed to be that I was leaning too much on my left ski. It figures, My board stance is 'regular', meaning left foot in front.

The fix: a day of skiing without poles and some short-turn technical exercises.