Effect of abdominal bracing training on strength and power of trunk and lower limb muscles
Effect of abdominal bracing training on strength and power of trunk and lower limb muscles
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腹部支撑训练对躯干和下肢肌肉力量和爆发力的影响
DOI：
10.1007/s00421-016-3424-9
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发表时间：
2016
影响因子：
3
通讯作者：
Hiroaki Kanehisa
中科院分区：
文献类型：
--
作者：
Kota Tayashiki;Sumiaki Maeo;Seiji Usui;Naokazu Miyamoto;Hiroaki Kanehisa
目的腹部支撑术是一种提高躯干和下肢肌肉力量的训练方法，目前尚不清楚。方法20名青年男性（23.3 ± 1.8岁）被分为训练组（TG，n= 11）和对照组（CG，n= 9）。TG进行了为期8周的训练计划（3天/周），包括2s的最大腹部支撑，然后是2s的肌肉放松（5 × 10次/天）。测量干预前后躯干屈伸、伸髋、伸膝时的最大等长肌力、坐位最大举力量和腹肌厚度。另外，还测定了在最大腹部支撑和最大提升任务中躯干和下肢肌肉的表面肌电和腹内压（IAP）。结果干预后，TG在等长躯干伸展中表现出明显的增加（+14.4%）和髋关节伸展（+34.7%）的力量和最大举力量（+15.6%），而CG在力量和力量变量方面没有显示出任何变化。此外，TG在斜内肌厚度上有显著增加，（+22.4%），腹部支撑期间的最大IAP（+36.8%），举重时IAP升高率（+58.8%），结论本研究表明，最大自愿合作的训练方式，在不使用外部负荷的情况下，在涉及躯干和臀部伸展的运动期间，腹部肌肉的收缩可以是用于增加力量和动力的有效策略。
PurposeIt is unknown whether maximal voluntary co-contraction of abdominal muscles, called abdominal bracing, can be a training maneuver for improving strength and power of trunk and lower limb muscles. The present study aimed to elucidate this.MethodsTwenty young adult men (23.3 ± 1.8 years) were allocated to training (TG,n= 11) or control (CG,n= 9) group. TG conducted an 8-week training program (3 days/week) consisting of 2-s maximal abdominal bracing followed by 2-s muscle relaxation (5 × 10 repetitions/day). Maximal voluntary isometric strength during trunk flexion and extension, hip extension, and knee extension, maximal lifting power from sitting position, and the thicknesses of abdominal muscles were measured before and after the intervention. In addition, surface electromyograms from trunk and lower limb muscles and intra-abdominal pressure (IAP) during the maximal abdominal bracing and maximal lifting tasks were also determined.ResultsAfter the intervention, TG showed significant increases in isometric trunk extension (+14.4 %) and hip extension (+34.7 %) strength and maximal lifting power (+15.6 %), while CG did not show any changes in strength and power variables. Furthermore, TG had significant gains in the muscle thickness of the oblique internal (+22.4 %), maximal IAP during abdominal bracing (+36.8 %), and the rate of IAP rise during lifting task (+58.8 %), without corresponding changes in CG.ConclusionThe current study indicates that a training style with maximal voluntary co-contraction of abdominal muscles can be an effective maneuver for increasing strength and power during movements involving trunk and hip extensions, without using external load.