You should add some subcategories to the Nordic Ski activity type.
There should be Classic, and Skating (or Free Technique).
Also, if you wanted to be really in touch with the sport, Double-Poling could be another subcategory because that is an option in classic races or workouts given a sufficiently conditioned upper body. Waxing for glide only, with no kick wax, and double poling the entire distance can be a very competitive strategy given the right conditions.
