Delisle Anthony T, Piazza-Gardner Anna K, Cowen Tiffany L, Huq Mona B Sayedul, Delisle Alexis D, Stopka Christine B, Tillman Mark D
1Department of Health Education & Behavior, University of Florida, Gainesville, Florida; and 2Department of Kinesiology & Health Promotion, Troy University, Troy, Alabama.
J Strength Cond Res. 2014 Oct;28(10):2717-23. doi: 10.1519/JSC.0000000000000481.
Currently, a submaximal protocol is used to measure cardiorespiratory fitness in firefighters by estimating their true aerobic capacity (V[Combining Dot Above]O2max); however, this submaximal test has not been cross-validated among firefighters. Thirty firefighters (85% male, 15% female), completed the submaximal protocol and the maximal (Bruce) treadmill protocol on separate occasions. Pearson's correlation analyses between the submaximal and Bruce protocol revealed a significant moderate positive correlation (r = 0.635, p = 0.005). The range of mean V[Combining Dot Above]O2max values and SDs produced from the submaximal and maximal protocols varied greatly (35.4-50.9 vs. 28.6-58.4 ml·kg·min, and SD of 3.91 vs. 7.22, respectively). The submaximal V[Combining Dot Above]O2 test underestimated the true V[Combining Dot Above]O2max in the majority of firefighters (72.4%) and overestimated the true V[Combining Dot Above]O2max in the remainder of firefighters. Participants with a higher body fat percentage were more likely (p = 0.0157) to have an overestimated true V[Combining Dot Above]O2max than those with a lower-body fat percentage. Our results indicate the current submaximal V[Combining Dot Above]O2 test used to measure cardiorespiratory fitness in firefighters is an improvement over previous protocols. However, our findings also show that the accuracy of this submaximal test for predicting the true V[Combining Dot Above]O2max in firefighters is questionable, and may not identify firefighters who possess substandard cardiorespiratory fitness, particularly in those with a higher percentage of body fat. Thus, the results of this study indicate that improvements to the current Fire Service Joint Management, Wellness & Fitness Initiative (WFI) V[Combining Dot Above]O2 assessment is still needed to accurately reflect the true V[Combining Dot Above]O2max of individual firefighters.
目前，一种次最大运动方案被用于通过估算消防员的真实有氧能力（最大摄氧量，V̇O₂max）来测量他们的心肺适能；然而，这种次最大运动测试尚未在消防员群体中进行交叉验证。30名消防员（85%为男性，15%为女性）在不同时间分别完成了次最大运动方案和最大运动（布鲁斯）跑步机方案。次最大运动方案与布鲁斯方案之间的Pearson相关性分析显示出显著的中度正相关（r = 0.635，p = 0.005）。次最大运动方案和最大运动方案得出的平均V̇O₂max值范围和标准差差异很大（分别为35.4 - 50.9 vs. 28.6 - 58.4 ml·kg·min，标准差为3.91 vs. 7.22）。在大多数消防员（72.4%）中，次最大V̇O₂测试低估了真实的V̇O₂max，而在其余消防员中则高估了真实的V̇O₂max。体脂百分比更高的参与者比体脂百分比更低的参与者更有可能（p = 0.0157）高估真实的V̇O₂max。我们的结果表明，当前用于测量消防员心肺适能的次最大V̇O₂测试比以前的方案有所改进。然而，我们的研究结果还表明，这种次最大测试预测消防员真实V̇O₂max的准确性值得怀疑，并且可能无法识别心肺适能不达标的消防员，尤其是那些体脂百分比更高的消防员。因此，本研究结果表明，仍需要改进当前的消防服务联合管理、健康与健身倡议（WFI）V̇O₂评估，以准确反映个体消防员的真实V̇O₂max。
