Allard P, Chavet P, Barbier F, Gatto L, Labelle H, Sadeghi H
Motion Research Laboratory, Research Center, Sainte-Justine Hospital, Montreal, Quebec, Canada.
Am J Phys Med Rehabil. 2004 Sep;83(9):689-97. doi: 10.1097/01.phm.0000137344.95784.15.
The objective of this study was to determine the effect of body somatotype on standing balance in girls with adolescent idiopathic scoliosis (AIS) who are under observation but not wearing a body brace.
In all, 74 girls participated in this study to form the able-bodied (n = 36) and the AIS (n = 38) groups, having an average age of 13 yrs. Quiet standing balance was tested using a force platform. Afterward, subjects in each group were divided according to their dominant body somatotype, namely endomorphs (fatness), mesomorphs (muscular), or endomorphic ectomorphs (lean).
The center of pressure measured in the anteroposterior position was closer to the heels for the AIS ectomorphic group by approximately 14 mm (P = 0.00497). Only the AIS mesomorphic group displayed a statistically significant 12-mm shift to the right in their center of pressure (P = 0.01211) compared with the able-bodied girls of the same morphotype. In the endomorphic group, the sway area was statistically higher for the scoliotic subjects (P = 0.00839). The distances traveled by the AIS subjects were all statistically longer for all three body morphologic somatotypes.
Different postural responses seem to be dependent on body somatotypes. The endomorphic AIS girls had a larger sway area than their able-bodied counterparts while maintaining a similar center of pressure position. The AIS ectomorphic girls had a tendency to lean further back than a comparable able-bodied group. This could be emphasizing a hypokyphotic trunk attitude and increasing the risk of spinal deformity progression. The AIS mesomorphic subjects characterized by a large muscular and bony structure had a tendency to position their center of mass more to their right, indicating less postural adaptability and a stiffer trunk.
本研究的目的是确定身体体型对接受观察但未佩戴身体支具的青少年特发性脊柱侧凸（AIS）女孩站立平衡的影响。
共有74名女孩参与本研究，组成健康对照组（n = 36）和AIS组（n = 38），平均年龄为13岁。使用测力平台测试安静站立平衡。之后，每组受试者根据其主要身体体型进行划分，即内胚层体型（肥胖型）、中胚层体型（肌肉型）或内胚层外胚层体型（消瘦型）。
AIS外胚层体型组在前后方向上测量的压力中心比健康对照组更靠近脚跟约14毫米（P = 0.00497）。与相同体型的健康女孩相比，只有AIS中胚层体型组的压力中心在统计学上有向右侧显著偏移12毫米的情况（P = 0.01211）。在内胚层体型组中，脊柱侧凸受试者的摆动面积在统计学上更高（P = 0.00839）。对于所有三种身体形态体型，AIS受试者移动的距离在统计学上都更长。
不同的姿势反应似乎取决于身体体型。内胚层体型的AIS女孩摆动面积比健康对照组大，同时保持相似的压力中心位置。AIS外胚层体型女孩比可比的健康组有更向后倾斜的趋势。这可能会加重脊柱后凸不足的躯干姿态，并增加脊柱畸形进展的风险。以大肌肉和骨骼结构为特征的AIS中胚层体型受试者有将其质心更多地定位在右侧的趋势，表明姿势适应性较差且躯干更僵硬。
