Department of Kinesiology, University of North Alabama, Florence, Alabama.
J Strength Cond Res. 2022 Jul 1;36(7):1833-1838. doi: 10.1519/JSC.0000000000003722. Epub 2020 Sep 2.
Sharp, DW, Swain, JC, Boy, TG, Killen, LG, Green, JM, and O'Neal, EK. Effects of 2.4 kg of proximal external loading on 5-km running performance. J Strength Cond Res 36(7): 1833-1838, 2022-Racing weight is a popular topic in the running community. This study examined effects of modest loading via a ∼2.4-kg soft and malleable weighted compression garment on overground running performance. Former and current collegiate cross-country runners (5 women and 6 men) completed 2 outdoor, solo road course runs 7 days apart on a familiar training route. During the first run (CON) subjects ran as closely as possible to their goal pace for a "hard speed day" workout based on predetermined paces according to current training level. During a subsequent run, subjects attempted to match their pace with aid from global positioning system watches and splits verbally announced on the course while wearing the weighted compression garment (LOAD). Metabolic data was later assessed during 5-minute running bouts on a treadmill with CON and LOAD conditions at subject's CON run pace. LOAD was slower (p < 0.01) at the 1.6-km mark (6:03 ± 0:37 vs. 6:13 ± 0:40) and finish (18:29 ± 2:06 vs. 19:15 ± 2:16). There was no differentiation (p > 0.05) between V̇o2 (CON 3.47 ± 0.86; LOAD 3.56 ± 0.77 L·min-1) or respiratory exchange ratio (CON 1.05 ± 0.06; LOAD 1.06 ± 0.04) during the 5-minute running economy bouts. There was an inverse (r = -0.42) but nonsignificant (p = 0.22) relationship between percent difference in body mass and percent difference in performance. Metabolic variable differentiation was not detectable at race pace, but 2.4 kg of proximal loading resulted in an approximately 4% acute performance impairment.
肖普，DW，斯温，JC，博伊，TG，基伦，LG，格林，JM，奥尼尔，EK。2.4 千克近端外部加载对 5 公里跑步表现的影响。J 力量与调节研究 36（7）：1833-1838，2022-比赛体重是跑步界的一个热门话题。本研究通过一种约 2.4 千克的柔软且可变形的加压服装来检查适度加载对户外跑步表现的影响。前和现任大学生越野跑运动员（5 名女性和 6 名男性）在 7 天的时间里，在熟悉的训练路线上进行了 2 次户外、单人公路赛。在第一次跑步（CON）中，根据当前训练水平，根据预定的配速，运动员尽可能接近他们的目标速度进行“硬速日”训练。在随后的跑步中，运动员试图在穿着加压服装（LOAD）的情况下，通过全球定位系统手表和赛道上的分段语音宣布来匹配他们的速度。代谢数据随后在跑步机上以 CON 和 LOAD 条件评估 5 分钟的跑步冲刺，CON 条件下的跑步速度为运动员的 CON 跑步速度。LOAD 在 1.6 公里标记处（6:03 ± 0:37 比 6:13 ± 0:40）和终点（18:29 ± 2:06 比 19:15 ± 2:16）更慢（p < 0.01）。在 5 分钟的跑步经济性冲刺中，VO2（CON 3.47 ± 0.86；LOAD 3.56 ± 0.77 L·min-1）或呼吸交换率（CON 1.05 ± 0.06；LOAD 1.06 ± 0.04）没有差异（p > 0.05）。在比赛速度下，无法检测到代谢变量的差异，但 2.4 千克的近端负荷导致约 4%的急性运动表现受损。
