Townsend M C
Am Rev Respir Dis. 1984 Jul;130(1):123-4. doi: 10.1164/arrd.1984.130.1.123.
To date, only one study has empirically examined the effects of sitting versus standing posture on the spirometric forced expiratory volumes. Because of design limitations, the small excess of sitting over standing values found in that study may have been due to a positive testing order effect. Using a crossover design, the present study of 90 middle-aged male subjects alternated the sitting-standing and standing-sitting testing sequence between subjects to avoid confounding by testing order effects. The major findings were that forced expiratory volumes in one and in six seconds and forced vital capacity were significantly larger (p less than 0.001) in the standing than in the sitting posture, with mean standing minus sitting differences ranging from +0.06 to +0.08 L for the 3 indexes. The larger expired volumes measured in the standing position in this study were probably due to the subjects taking slightly larger inspirations in this posture than in the sitting position.
迄今为止，仅有一项研究通过实证检验了坐姿与站姿对肺活量测定中的用力呼气量的影响。由于设计上的局限性，该研究中发现的坐姿数值比站姿数值略高的情况，可能是由于正向测试顺序效应所致。本研究采用交叉设计，对90名中年男性受试者进行研究，在受试者之间交替采用坐姿-站姿和站姿-坐姿的测试顺序，以避免测试顺序效应造成混淆。主要研究结果为，站立时的一秒用力呼气量、六秒用力呼气量和用力肺活量均显著大于坐姿时（p<0.001），这3项指标的站立值减去坐姿值的平均差值在+0.06至+0.08升之间。本研究中在站立位测得的呼出量较大，可能是因为受试者在该姿势下的吸气量比坐姿时略大。
