J Orthop Sports Phys Ther. 1992;15(2):99-106. doi: 10.2519/jospt.1992.15.2.99.
Presented at the Sports Physical Therapy Section Team Concept Meeting, December 1991, New Orleans, LA. Recent availability of trunk isokinetic dynamometers has created a need for documented normative data. The purpose of this initial investigation was to determine isokinetic norms for trunk flexion and extension in classical ballet dancers. Strength levels were determined by peak torque. A fatigue index was derived from 20 reciprocal contractions. Twenty-three dancers were tested - 17 females (F) and six males (M). Female dancers were further divided into professional (FP) and semiprofessional (FSP) groups. A questionnaire regarding dance background, training habits, and back pain was administered. Means and ranges for peak torque and fatigue were calculated for each group. T-tests were performed on peak torque and fatigue data grouped by gender and dance status. Peak torque analysis indicated trends of M > F and FP > FSP. A statistically significant (p < 0.05) difference existed for trunk extension between FP and FSP dancers, a possible sport-specific adaptation. Fatigue levels were lower than expected, and possible explanations are considered. J Orthop Sports Phys Ther 1992;15(2):99-106.
1991 年 12 月在新奥尔良举行的运动物理治疗科团队概念会议上提出。躯干等速测力仪的近期可用性产生了对记录规范数据的需求。本初步研究的目的是确定古典芭蕾舞演员躯干屈伸的等速运动学规范。强度水平由峰值扭矩确定。疲劳指数源自 20 次反向收缩。对 23 名舞者进行了测试-17 名女性（F）和 6 名男性（M）。女性舞者进一步分为专业舞者（FP）和半专业舞者（FSP）组。发放了一份关于舞蹈背景、训练习惯和背痛的问卷。为每个组计算了峰值扭矩和疲劳的平均值和范围。根据性别和舞蹈状况对峰值扭矩和疲劳数据进行 t 检验。峰值扭矩分析表明 M> F 和 FP> FSP 的趋势。FP 和 FSP 舞者之间的躯干伸展存在统计学上显著差异（p < 0.05），这可能是特定于运动的适应。疲劳水平低于预期，考虑了可能的解释。J Orthop Sports Phys Ther 1992;15(2):99-106.
