The effects of various pole lengths on cross-country skiing poling mechanics

Cross-country skiing - Physiological aspects;Human mechanics;Cross-country skiing - Equipment and supplies

Borgemoen, David L.Floyd, William Ph.D. ;

University of Wisconsin

关键词: Cross-country skiing - Physiological aspects;    Human mechanics;    Cross-country skiing - Equipment and supplies;   

Others  :  https://minds.wisconsin.edu/bitstream/handle/1793/48656/Oborgemoendavid1988.pdf?sequence=1&isAllowed=y

瑞士|英语

来源: University of Wisconsin

【 摘 要 】

This study observed the diagonal stride of cross-countryskiing cinematographically, to compare the effects of fivedifferent pole lengths on the mechanics of the kick, glideand pole implantation phases, The ;;preferred;; pole lengthwas 35 cm. less than subjects (Ss)body height; the otherfour pole lengths were 10 cm. longer, five cm. longer, fivecm. shorter and 10 cm. shorter than the ;;preferred;; polelength. All Ss used the same brand of ski equipment.Thirteen male and female ranged in age from 20-36 yrs.,and skied each of the five trials with a different polelength. All trials were filmed at 150 frames per second andanalyzed against nine variables. A Single Factor Analysisof Variance (ANOVA) with Repeated Measures followed by aBonferroni T test was used to analyze the followingvariables: velocity, stride length, stride rate, trunkflexion, trunk extension, angular displacement from trunkflexion to trunk extension, lower leg angle at legs;;parallel position, pole plant displacement, and pole angleat implantation. Significant differences (P<.05) created bythe various pole lengths were found in the absolute angle oftrunk flexion, the absolute trunk angle at trunk extension,the horizontal displacement of the pole plant in relation tothe support foot, and the absolute pole angle at poleimplantation. No significant differences (P>.05) were foundin velocity, stride length, stride rate, angulardisplacement from trunk flexion to trunk extension, or thelower leg angle at legs parallel position. It was concludedthat specific pole lengths do have an effect on variouspoling mechanics of the diagonal stride of cross-countryskiing.