Theses and Dissertations at Montana State University (MSU)
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Item Flexibility as a determinant of rollerskiing economy in cross-country skiers(Montana State University - Bozeman, College of Education, Health & Human Development, 2007) Camenisch, Karin; Chairperson, Graduate Committee: Daniel P. HeilThe purpose of this study was to examine the correlational relationship between selected measures of flexibility and roller-ski economy (E). Twelve male competitive cross-country skiers (Mean±SD: 21±3 yrs, 183.2±6.5 cm, 76.7±6.8 kg and 60.4±3.4 ml/kg/min VO2max) completed a VO2max test on a motorized treadmill to volitional exhaustion utilizing the Australian XC Ski-Striding protocol. Heart rate (HR) and oxygen consumption (VO2) were recorded with a metabolic cart using standard indirect calorimetry procedures. Immediately following the VO2max test, seven flexibility tests were administered bilaterally twice each by the same administrator in a counterbalanced order. Flexibility measures included rotation of spine, lateral flexion of spine, shoulder rotation, standing and lying horizontal hip abduction, modified sit-and-reach test, and passive leg raise (Flex1-Flex7). During a second lab visit, subjects performed three 10-min trials at preset heart rates (65%, 75%, and 85% of HRmax) using roller-skis on an indoor track oval.