When I was younger I used to believe that the only workout for skiing was skiing. But as I got older I found that I had more back issues early so I started doing a simple preseason ski workout to strengthen my core. Now I feel so much better and stronger in the early season. Core strength is crucial for skiing, particularly in the bumps and in difficult conditions.
This basic workout is not “hard core” and will work for average skiers with average fitness levels. It can be done in 15-20 minutes, 3-4 times per week. I try to do it every other day in the preseason and keep it up in the winter on days I don’t ski. The only equipment you need is a core or abs ball, some 10 lb dumb bells, and a resistance band kit. You can buy all it for about $60. You can do most of the workout while watching TV.