13108725:J.D. said:
If you haven't been to a gym since '03 you probably shouldn't be talking shit about what it's like. Getting a good pump on in the morning (quit snickering) is one of the more rewarding things you can do, and it's really convenient. Hiking up a mountain is great but you can't really do it on your lunch break.
Anyway, there's lots of good stuff you can do, but if there's one thing you do, GET A BOSU BALL.
It is quite literally the best tool you can possibly acquire for ski training. It's all muscle endurance and balance. When you're skiing, you're not trying to resist a bunch of weight a bunch of times in sequence (which is what rep exercises like leg press or squats or whatever are, effectively), excepting pillow lines I guess. No, you're putting almost constant pressure on your legs while maintaining balance.
The best way to train for skiing, or anything else, is to think about the movements and pressures you put on yourself when you're doing that thing, and then figure out some sort of training that simulates that by putting the same pressures on the same muscles. Hence, bosu. I particularly recommend jump squats and single leg squats with the round side up.
Other weight training is still really useful because doing leg press, hamstring curls, calf raises, lunges, etc etc etc or full body stuff like deads will help you build the strength you're ultimately using when you ski. But it doesn't translate directly.