The importance of core stabilization exercises for extremities associated with dynamic spinal stabilization prior to movement has been demonstrated. However, no previous studies have investigated the muscle-coordinated effects on the upper trapezius (UT), anterior deltoid (AD), pectoralis major (PM), bilateral transverse abdominis (TrA), bilateral internal oblique (IO), and bilateral external oblique (EO) in healthy adults. The purpose of this study was to compare the effects of the dynamic neuromuscular stabilization (DNS) breathing technique and the abdominal bracing (AB) technique on UT, AD, PM, bilateral IO/TrA, and bilateral EO motor control in healthy participants during horizontal shoulder adduction. Thirty-six participants, eight of whom were female, were randomized into an AB and a DNS group and performed horizontal shoulder adduction with loads (8 and 17 lb). The clinical outcomes were UT, AD, and PM muscle activation and TrA/IO and EO muscle activation. Paired t-tests were used to analyze electromyography (EMG) data to determine statistically significant differences in muscle activity between the two techniques. For the EMG analysis, the maximal voluntary isometric contraction was measured for normalization and then divided by the EMG amplitude value. The results showed that UT, AD, and PM muscle amplitudes were lower and TrA/IO and EO muscle amplitudes were higher with DNS than with AB (P<0.05). Our findings provide clinical evidence that core exercise with DNS is more effective in lessening UT, AD, and PM muscle activation and improving bilateral TrA/IO motor control than with AB.

中文翻译：

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健康成人负荷水平肩内收期间核心稳定训练对肌肉活动的影响：一项随机对照研究

已经证明了在运动前进行与动态脊柱稳定相关的四肢核心稳定练习的重要性。然而，以前没有研究调查过肌肉协调对上斜方肌 (UT)、三角肌前束 (AD)、胸大肌 (PM)、双侧腹横肌 (TrA)、双侧腹内斜肌 (IO) 和双侧外斜肌的影响。 (EO) 在健康成人中。本研究的目的是比较动态神经肌肉稳定 (DNS) 呼吸技术和腹部支撑 (AB) 技术对水平期间健康参与者的 UT、AD、PM、双侧 IO/TrA 和双侧 EO 运动控制的影响肩内收。三十六名参与者，其中八名是女性，被随机分为 AB 组和 DNS 组，并在负载（8 磅和 17 磅）的情况下进行水平肩内收。临床结果是 UT、AD 和 PM 肌肉激活以及 TrA/IO 和 EO 肌肉激活。配对 t 检验用于分析肌电图 (EMG) 数据以确定两种技术之间肌肉活动的统计学显着差异。对于 EMG 分析，测量最大自主等长收缩以进行标准化，然后除以 EMG 幅度值。结果表明，与 AB 组相比，DNS 组的 UT、AD 和 PM 肌肉幅度较低，TrA/IO 和 EO 肌肉幅度较高。配对 t 检验用于分析肌电图 (EMG) 数据以确定两种技术之间肌肉活动的统计学显着差异。对于 EMG 分析，测量最大自主等长收缩以进行标准化，然后除以 EMG 幅度值。结果表明，与 AB 组相比，DNS 组的 UT、AD 和 PM 肌肉幅度较低，TrA/IO 和 EO 肌肉幅度较高。配对 t 检验用于分析肌电图 (EMG) 数据以确定两种技术之间肌肉活动的统计学显着差异。对于 EMG 分析，测量最大自主等长收缩以进行标准化，然后除以 EMG 幅度值。结果表明，与 AB 组相比，DNS 组的 UT、AD 和 PM 肌肉幅度较低，TrA/IO 和 EO 肌肉幅度较高。磷<0.05）。我们的研究结果提供了临床证据，表明与 AB 相比，使用 DNS 进行核心锻炼在减少 UT、AD 和 PM 肌肉激活以及改善双侧 TrA/IO 运动控制方面更有效。