芭蕾舞训练如何改变无症状职业前舞者的踝关节肌腱形态和血液动力学？一项超声研究。

How does ballet training alter ankle tendinous morphology and hemodynamics in asymptomatic pre-professional dancers? An ultrasonographic study.

机构信息

Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital, College of Medicine, National Taiwan University, Taipei, Taiwan.

出版信息

J Sci Med Sport. 2019 Apr;22(4):392-396. doi: 10.1016/j.jsams.2018.09.231. Epub 2018 Sep 28.

DOI:10.1016/j.jsams.2018.09.231

PMID:30297215

Abstract

OBJECTIVES

Among symptomatic dancers, sonographic abnormalities are common. Whether asymptomatic dancers have any abnormalities remains unknown. Some dancers became cyanosis over distal feet after ballet training. The hemodynamic changes at the feet in ballet are not clearly understood.

DESIGN

Cross-sectional study.

METHODS

In 25 dancers and 14 non-dancers, B-mode ultrasonography was used to measure cross-sectional areas (CSA) of tendons of deep posterior compartment muscles. Doppler ultrasonography was used to measure peak velocity (V) of posterior tibial artery in three ankle postures: the neutral position, passively and forced actively plantar flexion (en pointe). The big toe oxygen saturation was recorded in neutral position and during 1-min en pointe. Single-leg standing heel rise test was performed to represent the muscle function.

RESULTS

The CSA of FHL was larger in dancers (0.26cm [0.20, 0.30] vs 0.21cm [0.17, 0.24], p<0.01), while other tendons were not different (all p>0.05). Higher V was recorded in passively plantar flexion than in neutral position (p<0.01, in both groups). The blood flow was undetectable during en pointe, more frequently in dancers (54.9% vs 14.3%, p<0.01). Oxygen saturation decreased during en pointe more prominently in dancers (85% [80, 90] vs 94% [84, 97], p<0.01). There was no significant difference in muscle function.

CONCLUSIONS

US showed the FHL tendon thickening and en pointe-related vascular compromise in pre-professional dancers, even when they are asymptomatic.

摘要

目的

在有症状的舞者中，超声异常很常见。无症状的舞者是否存在任何异常尚不清楚。一些舞者在芭蕾舞训练后出现远端足部发绀。芭蕾舞中足部的血液动力学变化尚不清楚。

设计

横断面研究。

方法

在 25 名舞者和 14 名非舞者中，使用 B 型超声测量深层后间隔肌肉肌腱的横截面积（CSA）。使用多普勒超声测量三种踝关节姿势（中立位、被动和主动跖屈（踮脚尖））的后胫骨动脉的峰值速度（V）。在中立位和 1 分钟踮脚尖期间记录大脚趾的氧饱和度。单腿站立脚跟抬高试验用于代表肌肉功能。

结果

舞者的 FHL CSA 较大（0.26cm[0.20,0.30]比 0.21cm[0.17,0.24]，p<0.01），而其他肌腱则无差异（均 p>0.05）。被动跖屈时 V 高于中立位（均 p<0.01，两组均如此）。踮脚尖时血流不可检测，在舞者中更为常见（54.9%比 14.3%，p<0.01）。舞者在踮脚尖期间的氧饱和度下降更为明显（85%[80,90]比 94%[84,97]，p<0.01）。肌肉功能无显著差异。