What does this mean? If you wait to start your ski training until late fall or winter, you are already far behind those who have trained throughout the summer & fall. This doesn't mean you have to give up other sports. Just focus on training that can benefit your skiing as well as your other sports. Rollerskiing is one of the best off-season training methods.
Ski Techniques
Classical: Diagonal Stride Technique
The most basic and tradition ski technique is called the diagonal stride. Emphasize an aggressive forward swing of your leg while maintaining lose hips and a lower back. As the skier glides one leg forward, the hips also are driven in the direction of the motion. Poles are used to extend the glide with the elbow bent around 90 degrees at the pole plant. Keep poling until hand is behind hips and hand is in a relaxed position.
Classical: Double Pole Technique
Good double poling can be thought of as the hips rocking forward of the ankle pivot point just before poling (so the skier can "fall" on the poles) and then rocking back at the end of the stroke so his or her weight is on the heels for the best glide. This is true for double pole with or without a kick and for double poling on skating skis too.
Skating: V1 Technique
The V1 technique is used for climbing hills and skiing slow stretches because it uses maximum power of the skis. Skis are planted at a wide angle. When the ski hits the snow, the poles are also planted. Poling is quick and powerful for the V1 technique. The waist has minimal compression, but some rotation.
Skating: V2 Technique
The V2 skate technique is used for fast conditions. Skis are planted at reduced angles compared to the V1 due to higher speeds. Initiate this technique by doubling poling (see below) and delay the skating motion until the hands are near the hips. It is important to keep the shoulders and hips forward with little to no rotation.
Some images were taken from biomekanikk.nih.no article on Biomechanics of Cross Country Skiing.
"Cross-country ski champions are born during summer, not winter training."
Good Position
Press your hips forward
Belly button should be ahead of ankle bone and the forward knee over the toe
Stand up RIGHT NOW and try this position with your hands held high, just about to plant poles.
Poor Position
Hips are sitting downward
Belly button is behind ankle bone
Cannot fall onto poles properly
This technique is very weak because it is difficult to fully transfer body weight.
V-1 Technique, Cont.
This is one of my favorite photos of the V1 skating technique. It shows local skier Lori Wesolek at ABR powering up a steep hill.
Look at what she is doing:
She steps forward with her ski like climbing stairs
Her power pole is high near her head for maximum power and lean
She is leaning forward
She has powerful compression of her knees and legs