Heil D P, Engen J, Higginson B K
Movement Science/Human Performance Lab, Department of Health and Human Development, Montana State University, Hoseaus 101, Bozeman, Montana MT 59717, USA.
Eur J Appl Physiol. 2004 Apr;91(4):481-7. doi: 10.1007/s00421-003-0992-2. Epub 2004 Feb 11.
This study tested the influence of three ski pole grip systems (pole grip + wrist strap) on peak upper body power output: a traditional system (Swix PC grip and simple strap); a modern system (Swix PC grip and SR94 strap); an integrated system (Yoko 232 grip and Yoko 232 strap). Nine men [mean (SD): 32 (12) years, 177.0 (5.4) cm, 75.1 (6.0) kg] and two women [24 (9) years, 174.6 (3.6) cm, 67.3 (7.7) kg], all of whom were experienced cross-country ski racers at the regional, national, or international level for the U.S., performed three successive upper body power (UBP) tests on a modified double-poling ergometer. Each subject performed three 15-s tests of UBP using stiff cross-country ski poles (classic length; same poles for all tests per subject) and a resistance corresponding to 3% of body mass. Peak UBP was determined as the highest 5-s average power output during the last 10 s of each test. The three grip systems were tested in a counterbalanced order with 3-3.5 min of rest between tests. Peak UBP data were analyzed using a two-factor RM ANOVA and Sheffe's post-hoc test at the 0.05 alpha level. Peak UBP for the integrated system [mean (SE): 169.2 (6.8) W or 2.30 (0.06) W/kg] was significantly higher than value for both the modern [164.1 (7.2) W or 2.23 (0.07) W/kg] and traditional systems [162.5 (7.0) W, or 2.21 (0.06) W/kg] for absolute and relative power output (P<0.05). Given that double-poling peak UBP can be influenced by the ski pole grip system, a skier's choice of grip system may also influence cross-country ski racing performance.
本研究测试了三种滑雪杖握把系统(杖握把 + 腕带)对上身峰值功率输出的影响:一种传统系统(Swix PC握把和简单腕带);一种现代系统(Swix PC握把和SR94腕带);一种集成系统(Yoko 232握把和Yoko 232腕带)。九名男性[平均(标准差):32(12)岁,177.0(5.4)厘米,75.1(6.0)千克]和两名女性[24(9)岁,174.6(3.6)厘米,67.3(7.7)千克],他们均为美国地区、国家或国际水平的经验丰富的越野滑雪运动员,在一台改良的双杖测力计上进行了三次连续的上身功率(UBP)测试。每位受试者使用硬式越野滑雪杖(标准长度;每位受试者在所有测试中使用相同的滑雪杖)和相当于体重3%的阻力进行三次15秒的UBP测试。峰值UBP被确定为每次测试最后10秒内最高的5秒平均功率输出。三种握把系统按平衡顺序进行测试,每次测试之间休息3 - 3.5分钟。使用双因素重复测量方差分析和0.05显著性水平的谢费尔事后检验对峰值UBP数据进行分析。集成系统的峰值UBP[平均(标准误):169.2(6.8)瓦或2.30(0.06)瓦/千克]在绝对和相对功率输出方面均显著高于现代系统[164.1(7.2)瓦或2.23(0.07)瓦/千克]和传统系统[162.5(7.0)瓦或2.21(0.06)瓦/千克](P<0.05)。鉴于双杖峰值UBP会受到滑雪杖握把系统的影响,滑雪者对握把系统的选择也可能会影响越野滑雪比赛成绩。