Surface EMG Data from Latissimus Dorsi

To investigate if latissimus dorsi (LD) activity during trunk and pelvic girdle motions is comparable to its activity during shoulder internal rotation (SIR).  Fifteen physically active males performed maximal voluntary isometric contractions (MVICs) of SIR and 12 trunk and pelvic movements. Surface electromyography (sEMG) was used to measure LD muscle activity. LD muscle activity was recorded using a multichannel surface electromyography (sEMG) amplifier/processor unit (MyoClinical, Noraxon USA INC; Scottsdale, AZ). Bipolar Ag-AgCl disc surface electrodes (Blue Sensor SE, Ambu Inc. Denmark) were used with a 2 cm inter-electrode distance. The raw sEMG signal was amplified (input impedance: 10 MΩ, gain: 1000x, common mode rejection ratio: >115 dB), full-wave rectified, and filtered using a 6th order Butterworth filter (band-pass: 8-535 Hz). Inside the dataset is the average EMG activity of the means of the middle 3 out of 5 seconds of 3 trials for each motion. The dataset also has the height, weight, and age of each participant.

本研究旨在探究背阔肌（latissimus dorsi, LD）在躯干与骨盆带运动中的激活水平是否与肩关节内旋（shoulder internal rotation, SIR）时的激活水平相当。招募15名规律运动的男性受试者，完成肩关节内旋及12种躯干与骨盆运动的最大自主等长收缩（maximal voluntary isometric contractions, MVICs）测试。采用表面肌电图（surface electromyography, sEMG）技术采集背阔肌肌电活动，使用多通道表面肌电放大/处理单元（MyoClinical，美国Noraxon公司，亚利桑那州斯科茨代尔）完成信号记录。电极采用双极Ag-AgCl圆盘状表面电极（Blue Sensor SE，丹麦Ambu公司），电极间距设置为2厘米。原始sEMG信号经放大（输入阻抗：10 MΩ，增益：1000倍，共模抑制比：>115 dB）、全波整流，并通过6阶巴特沃斯（Butterworth）滤波器进行8-535 Hz带通滤波处理。本数据集包含每项运动3次测试中，截取5秒时长内中间3秒的肌电信号均值的平均值，同时收录每位受试者的身高、体重与年龄信息。