Edinborough Luke, Fisher James P, Steele James
Southampton Solent University, Southampton, United Kingdom.
J Strength Cond Res. 2016 May;30(5):1189-95. doi: 10.1519/JSC.0000000000001215.
The aim of this study was to use a fatigue response test to measure the muscular fatigue (defined as a reduction in torque production) sustained by the lumbar extensors after a single set of kettlebell swings (KBS) in comparison with isolated lumbar extensions (ILEX) and a control condition (CON). The purpose of which is to measure the physiological response of KBS against an already established modality. Subsequent data provide insight of the efficacy of kettlebells swings in strengthening the lumbar muscles and lower back pain treatment. Eight physically active males participated in a repeated measures design where participants completed all conditions. There were statistically significant reductions in maximal torque, reported as strength index (SI), after both KBS and ILEX exercise. A statistically significant difference was found for reductions in maximal torque between CON and both KBS (p = 0.005) and ILEX (p = 0.001) and between KBS and ILEX (p = 0.039). Mean reduction and effect sizes were -1824 ± 1127.12 (SI) and -1.62 for KBS and -4775.6 ± 1593.41 (SI) and -3.00 for ILEX. In addition, a statistically significant difference was found between KBS and ILEX for rate of perceived exertion (p = 0.012). Data suggest that both KBS and ILEX were able to fatigue the lumbar extensors. Isolated lumbar extension was able to generate a greater level of fatigue. However, contrary to previous research, the KBS was able to elicit a physiological response, despite the lack of pelvic restraint supporting the potential to strengthen the lumbar extensors.
本研究的目的是使用疲劳反应测试来测量在进行一组壶铃摆动（KBS）后，与孤立的腰部伸展运动（ILEX）和对照条件（CON）相比，腰部伸肌所承受的肌肉疲劳（定义为扭矩产生的减少）。其目的是测量KBS相对于已确立的运动方式的生理反应。后续数据提供了壶铃摆动在增强腰部肌肉和治疗下背部疼痛方面的功效的见解。八名身体活跃的男性参与了重复测量设计，参与者完成了所有条件。在进行KBS和ILEX运动后，最大扭矩（以力量指数（SI）表示）均有统计学显著降低。在CON与KBS（p = 0.005）和ILEX（p = 0.001）之间以及KBS与ILEX之间（p = 0.039），最大扭矩降低存在统计学显著差异。KBS的平均降低值和效应大小分别为-1824 ± 1127.12（SI）和-1.62，ILEX的分别为-4775.6 ± 1593.41（SI）和-3.00。此外，在KBS和ILEX之间，自觉用力程度的速率存在统计学显著差异（p = 0.012）。数据表明，KBS和ILEX都能够使腰部伸肌疲劳。孤立的腰部伸展运动能够产生更高水平的疲劳。然而，与先前的研究相反，尽管缺乏骨盆约束来支持增强腰部伸肌的潜力，但KBS仍能够引发生理反应。
