Well, I’ve don a lot of endurance sport over some 14 years now. ( tri, speed skating, biking, adventure raring) . Both as a pro, and at national team level. I’ve been working with Hawaii top 10 finishers as a coach. I’m a teacher of physical education, and I work with skiing in the wintertime.
A normal week for me would be like so (preparing for a 1500m – 40k – 10k Olympic triathlon.):
· Monday: 1½ hour easy bike +2.500m swim with focus on technique easy
· Tuesday: 1hour run (20min easy + 5min semi hard + 6*2min on/2min off + 10 min easy cool down)
· Wednesday: 45 min easy run and 3-4.000m swim intervals do something like 15*100 m in this work out and remember to always focus on technique (swimming is like 80% technique and 20% power)
· Thursday: I would do a hard bike ride 2½-3½ hour. Lots of intervals like 1 hour 2min on/2min off or a pyramid (always 2min off and then 1 min on then 2,3,4,5 and so on.)
· Friday: Easy run 45 min maybe some speed but it’s important to let the body get fresh again. 3.000m in the pool with easy to medium hard intervals and a lot of technique.
· Saturday: long bike ride with a club – good for biking technique 3 hours. Medium hard
· Sunday: X training. I liked to do mini tri to get the body used to the ever changing momentum of the different sports. 4* (200m swim + 4 k bike + 1500m run) race speed 5 min break. 30-45min easy cool down on the bike.
The idea with this is to mix hard days with easy days. You can do some good active recuperation while training technique and getting endurance. Getting speed is the hard part.
Good luck. And any how it’ll get you in shape for skiing. (Then you just ad lifting weights and cut down on the endurance) remember to get the right shoos so you don’t get an injury, they have to fit your style of running and the way your foot is build. The most expensive Nikes might not be the best for you.