Department of Sports Sciences and Physical Education, Nord University, Levanger, Norway.
UiT The Arctic University of Norway, School of Sport Sciences, Tromsø, Norway.
PLoS One. 2019 Feb 22;14(2):e0211550. doi: 10.1371/journal.pone.0211550. eCollection 2019.
The benefits of using longer than self-selected poles have been shown in double poling, but these potential benefits have not been examined in the gear 3 ski skating sub-technique (G3), during which the poling movement is very similar to double poling. The aim of this study was to examine the effect of longer than self-selected poles on physiological and perceptual responses in the G3 sub-technique. Ten cross-country skiers and biathletes (VO2max 72.4 ± 3.0 ml∙min-1∙kg-1, age 20.1 ± 2.8 years, height 1.81 ± 0.03 m and weight 73.1 ± 4.6 kg) completed two tests, each with three different submaximal intensities, during roller skiing using the G3 technique. The first test was carried out at a fixed speed (10 km∙h-1) and the skiers performed two intervals of 5 min at 7, 9 and 11% inclination on a roller ski treadmill with self-selected poles (SSP) and 7.5 cm longer poles (LP) at each step. The second test had a fixed inclination of 4% and speeds of 14, 17 and 20 km∙h-1, also performed with SSP and LP at each step. At fixed speed, the oxygen uptake was 2.7% lower (P = 0.005) and the gross efficiency (GE) 2.1% higher (P = 0.01) with LP than with SSP at the steepest inclination of 11%. At fixed inclination, the oxygen uptake was 2.1% lower (P = 0.01) and the GE was 4.1% higher (P = 0.03) with LP than with SSP at the highest speed of 20 km∙h-1. At 14 km∙h-1, the oxygen uptake was 3.0% lower (P = 0.05) and GE was 3.8% higher (P = 0.03) with LP than with SSP. Our novel findings show that longer poles in the G3 technique may enhance the efficiency of skiing.
使用自选杆以外的更长滑雪杖的好处已经在双杖支撑中得到了证明，但这些潜在的好处尚未在装备 3 滑雪滑步（G3）技术中进行检查，在该技术中，撑杆动作与双杖支撑非常相似。本研究的目的是检查在 G3 技术中使用比自选杆更长的滑雪杖对生理和感知反应的影响。10 名越野滑雪运动员和冬季两项运动员（最大摄氧量 72.4±3.0ml·min-1·kg-1，年龄 20.1±2.8 岁，身高 1.81±0.03m，体重 73.1±4.6kg）在使用 G3 技术的滚轮滑雪中完成了两项测试，每项测试都有三个不同的亚最大强度。第一次测试是在固定速度（10km·h-1）下进行的，滑雪者在滚轮滑雪跑步机上以 7、9 和 11%的坡度进行了两次 5 分钟的间隔，每个步骤都使用自选杆（SSP）和 7.5cm 更长的杆（LP）。第二次测试的坡度固定为 4%，速度为 14、17 和 20km·h-1，也在每个步骤中使用 SSP 和 LP 进行。在固定速度下，在最陡的 11%坡度下，使用 LP 的耗氧量比 SSP 低 2.7%（P=0.005），总效率（GE）高 2.1%（P=0.01）。在固定坡度下，在最高速度 20km·h-1 下，使用 LP 的耗氧量比 SSP 低 2.1%（P=0.01），GE 高 4.1%（P=0.03）。在 14km·h-1 时，使用 LP 的耗氧量比 SSP 低 3.0%（P=0.05），GE 高 3.8%（P=0.03）。我们的新发现表明，在 G3 技术中使用更长的滑雪杖可能会提高滑雪的效率。
