Originally Posted by Adam Steer
If you are skiing well, in my experience the sling of muscle along what Thomas Myers calls the "Functional Lines" may end up being among the spots which feel the most "used."
The Back Functional Line will work all day long to keep you upright as it slings diagonally all the way up from your knee, across your glutes and into your contra-lateral latissimus dorsi. In skiing, you can think of it basically as a "tension line" which holds the structure in place, not allowing it to collapse back and down.
The Front Functional Line serves to flex the trunk all the way from the inside shoulder to the outside femur, creating both the "crunch" movement which aids in fore/aft balance and the internal rotation / adduction of the outside leg femur which assists in steering. The muscles involved are especially the obliques and the adductors.
You can picture the lines at work here. The back one holding me up like a tension wire and the front one coiling me up like a spring towards the outside boot.
Hope that helps.
I agree, for direct experience.
Most of my friends tend to complain about abdominal feeling sore after a ski day, especially at the beginning of the season...
Believe it or not I clearly remember feeling my butt sore, after a particularly intense (we covered all the possibilities in one day, bumps, off-piste, high speed skiing on-piste etc) beginning of the season day.
After suffering a broken backbone at 23, I also must say that my back muscles, in the following years, were losing strength very easily if not exercised...