What about squats, tucks, jumps and all that?

Deadlifts are Better than all that StuffDeadlifts are Better than all that Stuff

Those and lots of others are great exercises that will boost your skiing pleasure and help you ski better. No doubt about that. But deadlifts are better. Why? Those exercises all target your quads (thighs) or, at best, in the case of squats, primarily the quads and glutes, with some benefit for the back and hamstrings.

So, you're asking, isn't that a good thing? My quads always burn when skiing, so don't I want to get them strong? Well, yes, but the problem with that is that skiing works the quads. In fact, it works them hard. They will get stronger through the season. Want strong quads? Ski dammit!

When I was skiing hard all the time as a younger man, I used to walk into to bodybuilder gym with my skinny little legs, go up to the big boys who waddle as their huge thighs rub together and ask if I could rotate in on the 45-degree leg press sled. They would always look at me reluctantly, thinking about all the hassle of taking the weights on and off between sets, but they would suck it up and say "Sure". They would crank off their set with a dozen 45-pound plates (540 pounds plus the weight of the sled) and step off and ask how many plates I wanted as they reached to pull some plates off. I always enjoyed watching their mouths drop when I would say "That's fine" and hop on and crank out 12 reps with the same 540+ pounds.

The problem was that though skiing alone was making my quads and glutes strong already and the sled was adding to that (and in a constrained motion as well, which is bad and why we now hate machines right?). Meanwhile my hamstring and core strength was absolute crap. If you're skiing competitively, you need to exercise everything and you'll need to get the special hydraulic upgrade on your quads. But for most of us, you can get your primary ski muscles strong by skiing, but you want to survive the process, so in the pre-season, you get those supporting complementary muscles way strong.

Twenty years later, my quads ain't that strong anymore, but my core is better and no matter how long and hard I ski the bumps, I simply don't get the debilitating back soreness I once did, even when I was supposedly in great shape. That's because my hamstrings and my core in general, and low back in particular, are lots stronger and healthier.