Lee Benjamin, McGill Stuart
a Spine Biomechanics Laboratory, Department of Kinesiology, Faculty of Kinesiology , University of Waterloo , Waterloo , Canada.
J Sports Sci. 2017 Sep;35(17):1724-1733. doi: 10.1080/02640414.2016.1235791. Epub 2016 Sep 26.
"Core" exercise is a basic part of many physical training regimens with goals ranging from rehabilitation of spine and knee injuries to improving athletic performance. Core stiffness has been proposed to perform several functions including reducing pain by minimising joint micro-movements, and enhancing strength and speed performance. This study probes the links between a training approach and immediate but temporary changes in stiffness. Passive and active stiffness was measured on 24 participants; 12 having little to no experience in core training (inexperienced), and the other 12 being athletes experienced to core training methods; before and after a 15 min bout of isometric core exercises. Passive stiffness was assessed on a "frictionless" bending apparatus and active stiffness assessed via a quick release mechanism. Short-term isometric core training increased passive and active stiffness in most directions for both inexperienced and experienced participants, passive left lateral bend among experienced participants being the exception (P < 0.05). There was no difference between the inexperienced and experienced groups. The results confirm that the specific isometric training exercise approach tested here can induce immediate changes in core stiffness, in this case following a single session. This may influence performance and injury resilience for a brief period.
“核心”训练是许多体育训练方案的基本组成部分，其目标从脊柱和膝盖损伤的康复到提高运动成绩不等。有人提出核心刚度具有多种功能，包括通过最小化关节微运动来减轻疼痛，以及增强力量和速度表现。本研究探讨了一种训练方法与刚度的即时但暂时变化之间的联系。对24名参与者测量了被动和主动刚度；其中12名在核心训练方面几乎没有经验（无经验组），另外12名是有核心训练方法经验的运动员；在进行15分钟的等长核心训练前后进行测量。在“无摩擦”弯曲装置上评估被动刚度，并通过快速释放机制评估主动刚度。短期等长核心训练在大多数方向上增加了无经验组和有经验组参与者的被动和主动刚度，有经验组参与者的被动左侧弯曲除外（P<0.05）。无经验组和有经验组之间没有差异。结果证实，这里测试的特定等长训练方法可以在单次训练后立即引起核心刚度的变化。这可能会在短时间内影响运动表现和受伤恢复能力。
