I just read the line "consider replacing your standard lifts all together", in the article. That may be a bit of an extreme approach. The catch phrase we like to use, is ISOLATE then INTEGRATE
Also, I spoke about phase 2 and 3 of the Integrated Training System, but I did not talk about phase 1, which involves corective exercise. Before we have anyone attempt these insane exercises, first, we do an asessment for postural misalignment, muscle imbalances. Hypertonic muscles need to be lengthened, hypotonic muscles need to be strengthened. At this stage we teach some very basic exercises to enhance core stability. Trying to progress to the POWER STAGE of training without developing core stability is, in MOST cases, an exercise in futility.
You Can't Fire a Canon from a Canoe!
As far as strength training goes, there are 2 approaches. One is topographical, which involves the visual form the muscles take, the other is functional which relates to how well these muscles perform, in either sport or simply day to day living.
When you talk about sport, especially a sport such as skiing, things just do not happen in a predictable linear pattern, as they do on traditional equipment. Skiing is a multi planar activity. For that reason, you need to develop your strength in different planes of movement.
As I begin to understand more about skiing, as well as the neurological aspects of motor learning, I realize that a good deal of my own initial difficulties with the sport came from my unconscious expectation of the moves to be as predictable as the exercise machines I used to spend 2 hours a day working out on.