Technique, waxing and fitness - there's an app for that!

In this sport, how fast (and far) you go is dependent on:
 1. Technique, 2. Waxing, and 3. Fitness, in that order.  Most people have the impression that these are reversed.  Not so, assuming a base level of fitness.  The efficiencies required to go fast (and long) are very much driven by technique.  More so in classic than freestyle, which seems physically harder for the recreational skier but is easier to master.  It is also easier to wax for, as there is no grip wax component. One could always go with waxless skis for classic (and believe me, on some days this feels like the only option!), but this really compromises the glide component of the motion.  There is a great app complete with excellent video breakdowns of all components of technique for both classic and skating.  Demos are done by members of the Swiss national team.  Cross Country Skiing - Technique (produced by Bundesamt für Sport BASPO) available for IOS and Android.  Well worth $4.99.