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source : https://powerski-lab.blogspot.com/2026/09/ski-science-1-how-many-phases-does-ski.html How Many Phases Does a Ski Turn Really Have? A Cross-Country Comparison — and Why Steepness Changes the Answer PowerSki Lab | Ski Technique · Biomechanics — By Dr. Sungchul Yang Introduction Ask any certified ski instructor how a turn is structured, and you'll likely hear some version of "initiation, control, finish, transition." It's a clean, teachable model — but is it universal? Does a racer on a...

source: https://powerski-lab.blogspot.com/2026/09/knees-skiing-3-my-first-surgery.html As I shared last time, a failed jump landing on Yongpyong's Silver Slope left me with my first knee injury: a complete ACL tear. Back then — around 1989 — there was a saying: "If you tear your cruciate ligament, your career is over." For an athlete, a torn ACL was almost a death sentence. Deciding on surgery The next year I entered university and made up my mind to have the surgery. At the time, the two...

source : https://powerski-lab.blogspot.com/2026/09/knees-skiing-2-acl-tear-vs-meniscus.html In my last post, I shared how my first serious injury — at 14, on Korea's steepest race slope — turned out to be a complete ACL tear. That raises a natural question: what is an ACL tear, and how is it different from the other injury skiers fear most, a torn meniscus? Having lived through both, I want to describe what each actually feels like — in the moment, and in motion — in the hope it helps you...