Almeling M, Schega L, Witten F, Lirk P, Wulf K
University of Göttingen, Department of Anaesthesiology, Sprangerweg 3, 37075 Göttingen, Germany.
Undersea Hyperb Med. 2006 Jan-Feb;33(1):45-53.
According to international guidelines, fitness to dive is generally assessed using a bicycle stress test (BST) in air. To date, there is no study explicitly addressing the question whether the results of a BST in air really predict performance status under water. Therefore, the aim of the present study was twofold: first, to design an experimental setting allowing the examination of physical performance status under water, and second, to examine whether there is an association of response to exercise in air compared to exercise under water using self contained underwater breathing apparatus (SCUBA). We constructed and evaluated a measurement technique for a bicycle ergometry and for gas analysis under water. Part of the work was the development of a new valve system which allowed to collect the exhaled air in total and to transport it to the spirometer next to the pool. Twenty-eight healthy male divers underwent a BST. Compared to a given workload in air, gross capacity decreased significantly by about 50% underwater. High performance in air was associated with a high performance underwater. The examinations were carried out without any complications. In conclusion, our experimental setting allowed the safe and reliable examination of physical performance status under water. First results indicate that the results of a BST in air correlate well with the cardio-circulatory performance status underwater. A subsequent study with a larger sample size will enable us to more precisely model this correlation.
根据国际指南，潜水适宜性通常通过在空气中进行的自行车压力测试（BST）来评估。迄今为止，尚无研究明确探讨在空气中进行的BST结果是否真的能预测水下的身体表现状态。因此，本研究的目的有两个：第一，设计一种实验装置，以便能够检测水下的身体表现状态；第二，使用自给式水下呼吸器（SCUBA），研究在空气中运动与在水下运动的反应之间是否存在关联。我们构建并评估了一种用于水下自行车测力计和气体分析的测量技术。部分工作是开发一种新的阀门系统，该系统能够收集全部呼出气体并将其输送到泳池边的肺活量计中。28名健康男性潜水员接受了BST测试。与在空气中给定的工作量相比，水下的总体能力显著下降约50%。在空气中表现良好与在水下表现良好相关。检查过程未出现任何并发症。总之，我们的实验装置能够安全可靠地检测水下的身体表现状态。初步结果表明，在空气中进行的BST结果与水下的心肺循环表现状态密切相关。后续更大样本量的研究将使我们能够更精确地建立这种相关性模型。
