The purpose of the present study was to examine the relationships between neuromuscular function and functional balance performance in firefighters. Fifty career firefighters (35.1 ± 7.5 yr) performed isometric leg extension and flexion muscle actions to examine peak torque (PT), and absolute (aTQ) and normalized (nTQ; %PT) rapid torque variables at 50, 100, 150, and 200 ms. A performance index (PI) was determined from the functional balance assessment completion time. Partial correlations were used to examine the relationship between the PI and the maximal and rapid TQ variables for each muscle and the composite value, while controlling for demographic data related to the PI. Multiple regression analyses examined the relative contributions of the maximal and rapid aTQ variables, and demographic data on the PI. After controlling for age and %BF, the majority of the later aTQ and nTQ variables (100-200 ms) and PT were associated with the PI (r = -0.501--0.315). Age, %BF, and aTQ₁₀₀ explained 42-50% of the variance in the PI. Lower rapid strength, increased age, and poorer body composition were related to worse performance during the functional balance assessment. Strategies to improve rapid strength and %BF, especially in aging firefighters may impact dynamic balance abilities in firefighters.

中文翻译：

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消防员的神经肌肉功能与功能平衡表现之间的关系。

本研究的目的是检查消防员的神经肌肉功能与功能平衡表现之间的关系。50名职业消防员（35.1±7.5年）进行了等距腿部伸展和屈曲肌肉动作，以检查峰值扭矩（PT），绝对（aTQ）和归一化（nTQ;％PT）在50、100、150和200时的快速扭矩变量多发性硬化症。从功能平衡评估完成时间确定性能指标（PI）。偏相关用于检查PI与每个肌肉的最大TQ变量和快速TQ变量之间的关系以及复合值，同时控制与PI有关的人口统计数据。多元回归分析检查了最大和快速aTQ变量的相对贡献，以及PI上的人口统计数据。在控制了年龄和％BF之后，以后大多数aTQ和nTQ变量（100-200 ms）和PT与PI相关（r = -0.501--0.315）。年龄，％BF和aTQ₁₀₀解释了PI中方差的42-50％。在功能平衡评估期间，较低的快速强度，增加的年龄和较差的身体组成与较差的表现有关。提高快速强度和％BF的策略（尤其是在老化的消防员中）可能会影响消防员的动态平衡能力。