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首页> 外文期刊>Journal of athletic training >Retest reliability of force-time variables of neck muscles under isometric conditions.
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Retest reliability of force-time variables of neck muscles under isometric conditions.

机译：重新测试等轴测条件下颈部肌肉受力时间变量的可靠性。

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CONTEXT: Proper conditioning of the neck muscles may play a role in reducing the risk of neck injury and, possibly, concussions in contact sports. However, the ability to reliably measure the force-time-based variables that might be relevant for this purpose has not been addressed. OBJECTIVE: To assess the between-days reliability of discrete force-time-based variables of neck muscles during maximal voluntary isometric contractions in 5 directions. DESIGN: Cohort study. SETTING: University research center. PATIENTS OR OTHER PARTICIPANTS: Twenty-six highly physically active men (age = 21.6 +/- 2.1 years, height = 1.85 +/- 0.09 m, mass = 81.6 +/- 9.9 kg, head circumference = 0.58 +/- 0.01 m, neck circumference = 0.39 +/- 0.02 m). INTERVENTION(S): We used a custom-built testing apparatus to measure maximal voluntary isometric contractions of the neck muscles in 5 directions (extension, flexion, protraction, left lateral bending, and right lateral bending) on 2 separate occasions separated by 7 to 8 days. MAIN OUTCOME MEASURE(S): Variables measured were peak force (PF), rate of force development (RFD), and time to 50% of PF (T(50)PF). Reliability indices calculated for each variable comprised the difference in scores between the testing sessions, with corresponding 95% confidence intervals, the coefficient of variation of the typical error of measurement (CV(TE)), and intraclass correlation coefficients (ICC [3,3]). RESULTS: No evidence of systematic bias was detected for the dependent measures across any movement direction; retest differences in measurements were between 1.8% and 2.7%, with corresponding 95% confidence interval ranges of less than 10% and overlapping zero. The CV(TE) was lowest for PF (range, 2.4%-6.3%) across all testing directions, followed by RFD (range, 4.8%-9.0%) and T(50)PF (range, 7.1%-9.3%). The ICC score range for all dependent measures was 0.90 to 0.99. CONCLUSIONS: Discrete variables representative of the force-generating capacity of neck muscles under isometric conditions can be measured with an acceptable degree of reliability. This finding has possible applications for investigating the role of neck muscle strength-training programs in reducing the risk of injuries in sport settings.
机译：背景：适当调节颈部肌肉可能会降低颈部受伤的风险，并可能减少接触运动的脑震荡。但是，可靠地测量可能与此目的相关的基于力时变量的能力尚未得到解决。目的：评估在五个方向上最大的自愿等距收缩过程中，基于离散的基于力-时间的颈部肌肉变量的日间可靠性。设计：队列研究。地点：大学研究中心。患者或其他参与者：26位身体活跃的男性（年龄= 21.6 +/- 2.1岁，身高= 1.85 +/- 0.09 m，质量= 81.6 +/- 9.9 kg，头围= 0.58 +/- 0.01 m，颈围= 0.39 +/- 0.02 m）。干预：我们使用定制的测试设备在2个单独的情况下（分别以7到9个间隔）测量了颈部肌肉在5个方向（伸展，屈曲，伸出，左侧弯曲和右侧弯曲）的最大自愿等距收缩。 8天主要观察指标：测得的变量为峰值力（PF），力发展速率（RFD）和达到PF的50％的时间（T（50）PF）。为每个变量计算的可靠性指标包括测试会话之间的分数差异，相应的95％置信区间，典型测量误差的变异系数（CV（TE））和组内相关系数（ICC [3,3 ]）。结果：在任何运动方向上，相关措施均未发现系统偏见的证据。重新测试的测量差异在1.8％和2.7％之间，相应的95％置信区间范围小于10％，并且重叠为零。在所有测试方向上，PF的CV（TE）最低（范围为2.4％-6.3％），其次是RFD（范围为4.8％-9.0％）和T（50）PF（范围为7.1％-9.3％） 。所有相关指标的ICC得分范围为0.90至0.99。结论：可以在可接受的可靠性范围内测量代表等轴测条件下颈部肌肉产生力的离散变量。这一发现可能有可能用于研究颈部肌肉力量训练计划在降低运动环境中受伤风险中的作用。

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