yea as devashish pointed out, any bad technique is exaggerated on rollerskis. I have been ski racing (rollerskiing) for lots of years so I can do some L4 and higher intervals. But if you are a beginner, work on solid weight transfer and drills. For classic I do tons of double pole (DP) and kick double pole (kdp). For instance I will 2.5 hours of nothing but dp/kdp. When I skate, I try to concentrate on V2 and V2 alternate as these are balance intensive moves. But my prime skate workout is skating without poles. This is a GREAT lower body specific strength workout. I have done 3 hours of no skating with no poles and the lower body is pretty wrecked afterwards.
Luckily only about 4 more weeks of rollerskiing as the first Nor Am races are in West Yellowstone Thanksgiving week. Prey for snow!
Kurt@cycle-smart.com
http://www.pbmcoaching.com USA Triathlon Level 3 Elite Coach
USA Cycling Level 1 Elite Coach