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Points for Diagonal Stride (Classic Technique)

Completely move body weight from a balanced position on one ski to a balanced position over the other ski.
Keep the recovery foot unweighted until it is just in front of the support foot.
Balance completely over the support leg during the glide phase.
Maintain the same forward lean of the torso throughout the stride cycle.
At the end of the push phase, form a straight line with the push leg and torso from the shoulder to the snow.
As the legs pass each other to begin the push phase, make sure that the hip is in front of the ankle of the support foot.
Retrun the recovery leg forward as quickly and forcefully as possible.
During the glide, straighten the front knee to minimize the muscular effort of the support leg.
Preload (flex) the push leg to enhance the power of muscle contraction early in the stride.
Work the arms with a relatively straight front-to-back motion; keep the hand at or below shoulder height in front when planting the pole.
Follow through completely with the arms from shoulder extension at the front to pole release at the back.
Flex the elbow joint to provide power to the first half of the poling push.
Make precise and coodinated body movements -- given the terrain and tempo -- to ensure maximum efficiency.