Panhan Ana C, Gonçalves Mauro, Eltz Giovana D, Villalba Marina M, Cardozo Adalgiso C, Bérzin Fausto
Department of Morphology (Anatomy), Piracicaba Dental School, UNICAMP, Piracicaba, São Paulo, Brazil.
Department of Physical Education, São Paulo State University, UNESP, Rio Claro, São Paulo, Brazil.
J Bodyw Mov Ther. 2019 Oct;23(4):855-859. doi: 10.1016/j.jbmt.2019.03.014. Epub 2019 Apr 3.
To evaluate the electromyographic (EMG) activity of the rectus abdominis (RA) and internal oblique (IO) muscles during Pilates exercise on different trunk supporting bases.
Sixteen female Pilates practitioners participated in the study. EMG of the RA and OI muscles was evaluated during the double leg stretch (DLS) exercise on three different supporting bases - mat, long box, and short box. Trunk stability varies according to the size and type of the base. To normalize the data, the RMS value (EMG) obtained during the DLS exercise was divided by the RMS value from the torque test - the maximal voluntary isometric contraction (MVIC) - and multiplied by 100 (%MVIC). One-way repeated-measured analysis of variance (ANOVA) and Bonferroni tests were used to compare data concerning the supporting bases and Student t-test regarding the muscles (p < 0.05).
The comparison among the bases involving each muscle - RA or IO (p < 0.05) - showed significant difference (%MVIC) between the mat and the short box. No significant difference was observed between the muscles concerning the exercise on the mat (p = 0.9266), on the long box (p = 0.5113) and on the short box (p = 0.2972).
The short box increased the activity of the rectus abdominis and internal oblique muscles during exercise. The DLS exercise was able to challenge the stability of the trunk and thus recruit its stabilizer and mobilizer muscles at the same intensity.
评估在不同躯干支撑基础上进行普拉提运动时腹直肌（RA）和腹内斜肌（IO）的肌电图（EMG）活动。
16名女性普拉提练习者参与了该研究。在三种不同支撑基础——垫子、长箱和短箱上进行双腿伸展（DLS）运动时，评估RA和OI肌肉的肌电图。躯干稳定性根据支撑基础的大小和类型而变化。为使数据标准化，将DLS运动期间获得的均方根值（EMG）除以扭矩测试——最大自主等长收缩（MVIC）——的均方根值，并乘以100（%MVIC）。采用单向重复测量方差分析（ANOVA）和Bonferroni检验来比较有关支撑基础的数据，以及关于肌肉的学生t检验（p<0.05）。
涉及每块肌肉——RA或IO（p<0.05）——的支撑基础之间的比较显示，垫子和短箱之间存在显著差异（%MVIC）。在垫子上进行的运动（p=0.9266）、在长箱上进行的运动（p=0.5113）和在短箱上进行的运动（p=0.2972）中，肌肉之间未观察到显著差异。
短箱增加了运动期间腹直肌和腹内斜肌的活动。DLS运动能够挑战躯干的稳定性，从而以相同强度募集其稳定肌和运动肌。
