Originally Posted by Artmo
I've found that it's not so much the pulling up but the "ankling," i.e. pushing over the top when I remember to do it that makes 1-2mph difference.
That't not really ankling. Ankling is when you lift the front of the foot at the top and drop it at the bottom so your ankle flexes and extends with every stroke. It has long been discredited.
http://sheldonbrown.com/gloss_an-z.html#ankling
http://sheldonbrown.com/brandt/ankling.html