Viegi G, Giuliano G, Melocchi F, Pistelli G, Giuntini C
CNR Institute of Clinical Physiology, University of Pisa, Italy.
Respiration. 1988;54(1):33-41. doi: 10.1159/000195499.
In order to assess the variability of forced expiratory flows, 15 male players (age 16-19 years, height 182-201 cm) of the Italian National Junior Volley team were studied twice with the pneumotachygraph of the computerized Hewlett-Packard Pulmonary System. The first time (April), but not the second (July), all the subjects were physically trained. Each subject performed at least three acceptable forced vital capacity (FVC) maneuvers, following the standard of the American Thoracic Society, with the exception of the criterion for determining the FVC end point. Mean values of forced mid- and end-expiratory flows were significantly higher in April than in July. Inter- and intrasubject coefficients of variation were lower for FVC and forced expiratory volume in 1 s (FEV1) than for the flows. However, the within-subject variability of expiratory flows is lower in our athletes than in the subjects described by other authors. Our findings indicate the importance of forced expiratory flows in detecting even minor intra-subject variations related to physical training and suggest that flow in the terminal portion of the FVC curve may be at least moderately dependent upon effort.
为了评估用力呼气流量的变异性，对15名意大利国家少年排球队的男性运动员（年龄16 - 19岁，身高182 - 201厘米）使用惠普计算机化肺功能系统的呼吸流速仪进行了两次研究。第一次（4月），但第二次（7月）并非所有受试者都进行了体能训练。除了确定用力肺活量（FVC）终点的标准外，每个受试者都按照美国胸科学会的标准进行了至少三次可接受的用力肺活量（FVC）动作。4月份用力呼气中期和末期流量的平均值显著高于7月份。FVC和一秒用力呼气容积（FEV1）的受试者间和受试者内变异系数低于流量的变异系数。然而，我们的运动员呼气流量的受试者内变异性低于其他作者描述的受试者。我们的研究结果表明，用力呼气流量在检测与体能训练相关的即使是微小的受试者内变化方面很重要，并表明FVC曲线末端部分的流量可能至少中度依赖于用力。
