Grazioli Rafael, Loturco Irineu, Lopez Pedro, Setuain Igor, Goulart Jean, Veeck Filipe, Inácio Martinho, Izquierdo Mikel, Pinto Ronei S, Cadore Eduardo L
Exercise Research Laboratory, School of Physical Education, Physiotherapy, and Dance, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.
NAR-Nucleus of High Performance in Sport, São Paulo, Brazil.
J Strength Cond Res. 2023 Mar 1;37(3):629-635. doi: 10.1519/JSC.0000000000003813. Epub 2020 Oct 1.
Grazioli, R, Loturco, I, Lopez, P, Setuain, I, Goulart, J, Veeck, F, Inácio, M, Izquierdo, M, Pinto, RS, and Cadore, EL. Effects of moderate-to-heavy sled training using different magnitudes of velocity loss in professional soccer players. J Strength Cond Res 37(3): 629-635, 2023-This study investigated the effects of a 11-week moderate-to-heavy sled training intervention with different magnitudes of velocity loss on sprint and jump performance, mechanical muscle function, and body composition in professional soccer players. Seventeen players (age 25.8 ± 4.3 years; height 180.0 ± 8.6 cm; mass 77.7 ± 9.7 kg) were randomly allocated into 2 groups, based on different magnitudes of velocity loss: 10% of velocity decrease (G10, n = 8) and 20% of velocity decrease (G20, n = 9). The velocity-based sled training consisted of 20-m resisted sprints with a progressive loading increase from 45 to 65% of body-mass throughout the intervention. Pre-intervention and postintervention sprint and jump performance, hamstring and quadriceps peak torque and isometric rate of torque development, and lower-limb lean mass measured by dual X-ray absorptiometry were assessed and compared. Two-way repeated measures analysis of variance revealed a significant time-effect for decreases in 10- and 20-m sprint times ( p = 0.018 and p = 0.033, respectively), but without a time-group interaction. The G10 showed greater beneficial effects than G20 for both 10-m (-5.5 ± 3.3%, magnitude-based inference [MBI]: possibly vs. -1.7 ± 5.9%, MBI: possibly trivial) and 20-m (-2.5 ± 2.1%, MBI: possibly vs. -1.4 ± 3.7%, MBI: likely trivial) sprint times. Moreover, there was a significant time effect for countermovement jump height and quadriceps isometric peak torque, which decreased significantly after training ( p = 0.019 and p = 0.010, respectively), with no within-group effect of time vs. group interaction for these respective outcomes. The novel velocity-based sled model proposed here, especially under lower magnitudes of velocity loss, was able to significantly improve linear sprint performance in professional soccer players.
格拉齐奥利、R、洛图尔科、I、洛佩斯、P、塞图安、I、古拉特、J、维克、F、伊纳西奥、M、伊斯基耶多、M、平托、RS和卡多雷、EL。职业足球运动员使用不同速度损失幅度进行中等到重度雪橇训练的效果。《力量与体能研究杂志》37(3):629 - 635，2023年 - 本研究调查了一项为期11周的中等到重度雪橇训练干预对职业足球运动员短跑和跳跃成绩、肌肉机械功能以及身体成分的影响，该训练具有不同幅度的速度损失。17名运动员（年龄25.8±4.3岁；身高180.0±8.6厘米；体重77.7±9.7千克）根据不同的速度损失幅度被随机分为2组：速度降低10%（G10组，n = 8）和速度降低20%（G20组，n = 9）。基于速度的雪橇训练包括20米的阻力冲刺，在整个干预过程中负荷从体重的45%逐渐增加到65%。对干预前和干预后的短跑和跳跃成绩、腘绳肌和股四头肌的峰值扭矩以及等长扭矩发展速率，以及通过双能X线吸收法测量的下肢瘦体重进行了评估和比较。双向重复测量方差分析显示，10米和20米短跑时间的减少存在显著的时间效应（分别为p = 0.018和p = 0.033），但不存在时间 - 组交互作用。G10组在10米（-5.5±3.3%，基于幅度的推断[MBI]：可能 vs. -1.7±5.9%，MBI：可能微不足道）和20米（-2.5±2.1%，MBI：可能 vs. -1.4±3.7%，MBI：可能微不足道）短跑时间上比G20组显示出更大的有益效果。此外，反向纵跳高度和股四头肌等长峰值扭矩存在显著的时间效应，训练后显著下降（分别为p = 0.019和p = 0.010），对于这些各自的结果，在组内不存在时间与组交互作用的影响。这里提出的基于速度的新型雪橇模型，特别是在较低幅度的速度损失情况下，能够显著提高职业足球运动员的直线短跑成绩。
