Ski speed during the skating stroke results from the forces acting upon it which come from skier applied reaction forces and drag forces. Body positioning directly impacts the reaction forces. Based on comparison observations and general mechanics, we believe optimal uphill skating technique will involve an immediate beginning of leg extension as the ski touches the surface. Further, the ski set down and continued motion should remain near the skier`s center of mass without a large forward step from one ski to the other. While the skating forces generate substantial side to side motion, poling forces are probably best oriented to follow center of mass motion. This requires trunk rotation involving both pelvis and shoulders in parallel. During the course of this project, technique optimization has occurred for several skiers who had performance improvements which we associate with mechanical changes independent of fitness level. Their repeat sessions on the treadmill involved a general reduction of metabolic cost and lactate level under constant conditions.
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