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Effects of warm‐up on hamstring muscles stiffness: Cycling vs foam rolling

机译:热身对腿筋肌肉僵硬的影响:循环VS泡沫滚动

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This study investigated the effects of active and/or passive warm‐up tasks on the hamstring muscles stiffness through elastography and passive torque measurements. On separate occasions, fourteen males randomly completed four warm‐up protocols comprising Control, Cycling, Foam rolling, or Cycling plus Foam rolling (Mixed). The stiffness of the hamstring muscles was assessed through shear wave elastography, along with the passive torque‐angle relationship and maximal range of motion ( ROM ) before, 5, and 30?minutes after each experimental condition. At 5?minutes, Cycling and Mixed decreased shear modulus (?10.3%?±?5.9% and ?7.7%?±?8.4%, respectively; P ≤.0003, effect size [ ES ]≥0.24) and passive torque (?7.17%?±?8.6% and ?6.2%?±?7.5%, respectively; P ≤.051, ES ≥0.28), and increased ROM (+2.9%?±?2.9% and +3.2%?±?3.5%, respectively; P ≤.001, ES ≥0.30); 30?minutes following Mixed, shear modulus ( P =.001, ES =0.21) and passive torque ( P ≤.068, ES ≥0.2) were still slightly decreased, while ROM increased ( P =.046, ES =0.24). Foam rolling induced “small” immediate short‐term decreases in shear modulus (?5.4%?±?5.7% at 5?minutes; P =.05, ES =0.21), without meaningful changes in passive torque or ROM at any time point ( P ≥.12, ES ≤0.23). These results suggest that the combined warm‐up elicited no acute superior effects on muscle stiffness compared with cycling, providing evidence for the key role of active warm‐up to reduce muscle stiffness. The time between warm‐up and competition should be considered when optimizing the effects on muscle stiffness.
机译:本研究调查了通过弹性造影和被动扭矩测量的主动和/或被动热预热任务对腿筋肌肉僵硬的影响。在单独的场合中,14名雄性随机完成了四种热预热协议,包括控制,循环,泡沫轧制或循环加泡沫轧制(混合)。通过剪切波形弹性造影评估腿筋肌的刚度,以及在每个实验条件后5和30?分钟之前的被动扭矩角关系和最大运动(ROM)的最大运动(ROM)。在5?分钟,循环和混合减小的剪切模量(?10.3%?±5.9%和?7.7%?7.7%;P≤103,效果尺寸[ES]≥0.24)和被动扭矩(? 7.17%?±8.6%和?6.2%?±±7.5%;p≤.051,es≥0.28),增加ROM(+ 2.9%?±2. 2.9%和+ 3.2%?±3.5%分别;P≤001,ES≥0.30);混合后30?分钟,剪切模量(P = .001,ES = 0.21)和无源扭矩(P≤.068,ES≥0.2)仍然略微降低,而ROM增加(P = .046,ES = 0.24)。泡沫轧制诱导“小”即时短期剪切模量减少(Δ5.4%?±5.7%,5?分钟; P = .05,ES = 0.21),在任何时间点都没有被动扭矩或ROM的有意义的变化(p≥.12,ES≤0.23)。这些结果表明,与循环相比,联合预热不会对肌肉僵硬的剧烈效果无急性优势,提供了积极预热的关键作用以减少肌肉僵硬的关键作用。在优化对肌刚度的影响时,应考虑热身和竞争之间的时间。

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