High knees combine the typical running motion with exaggerated knee lifts. (fitwirr.com)
An over exaggerated running motion, where you spend more time in the air than you would with normal jogging or running. (fitbodyhq.com)
However, if you study the movements of an elliptical, you will notice that it mimics the natural strides of human running motion. (allworkoutroutines.com)