Miyamoto Kei, Iinuma Nobuki, Ueki Shunsuke, Shimizu Katsuji
Department of Reconstructive Surgery for Bone and Joint, Gifu University, Graduate School of Medicine, Gifu City, Gifu, Japan.
Clin Biomech (Bristol). 2008 Dec;23(10):1220-6. doi: 10.1016/j.clinbiomech.2008.07.010. Epub 2008 Sep 21.
Several mechanisms of how abdominal belts affect the trunk have been postulated, but very little is known about how the belts affect the cross-sectional shape of the trunk during trunk muscle exertions.
To evaluate the effects of abdominal belts on the cross-sectional shape of the trunk during contraction of the trunk muscles, CT images at the third lumbar vertebra level of 20 healthy males (age: 23-45 years) under 8 different conditions (combinations of performing or not performing the Valsalva maneuver after full inhalation or at neutral respiratory state, while wearing or not wearing a 100-mm-wide abdominal belt) were evaluated. The cross-sectional shapes of the trunk seen on CT images taken at the level of the 3rd lumbar vertebra were compared using three-way ANOVA.
Wearing the belt decreased the cross-sectional area of the trunk, and wearing it while performing the Valsalva maneuver and during inhalation compressed the postero-lateral part of the trunk and made the trunk nearly round by increasing the ratio of the anterior-posterior width to the right-left width.
A wide belt cinched around the abdomen exerts external hoop tension on the trunk and stiffens the trunk. When the belt is worn during the Valsalva maneuver after deep inhalation, the posterolateral portion of the trunk is compressed and the trunk becomes circular.
关于腹带如何影响躯干已有多种机制被提出，但对于腹带在躯干肌肉用力时如何影响躯干的横截面形状却知之甚少。
为评估腹带在躯干肌肉收缩时对躯干横截面形状的影响，对20名健康男性（年龄：23 - 45岁）在8种不同条件下（在完全吸气后或处于中性呼吸状态时进行或不进行瓦尔萨尔瓦动作，同时佩戴或不佩戴100毫米宽的腹带）第三腰椎水平的CT图像进行了评估。使用三因素方差分析比较在第三腰椎水平拍摄的CT图像上看到的躯干横截面形状。
佩戴腹带会减小躯干的横截面积，在进行瓦尔萨尔瓦动作和吸气时佩戴腹带会压缩躯干的后外侧部分，并通过增加前后宽度与左右宽度的比例使躯干近乎圆形。
束在腹部的宽腹带会对躯干施加外部环向张力并使躯干变硬。在深吸气后进行瓦尔萨尔瓦动作时佩戴腹带，躯干的后外侧部分会被压缩，躯干会变成圆形。
