摘要:

The purpose of these experiments was to compare two systems for measuring oxygen uptake (&OV0312;o2); the open circuit method of indirect calorimetry (Rv), which is commonly used in human studies, and the open flow method, which has been adopted in a variety of animal studies. &OV0312;o2measured using the Rv system (procedure 1) was accepted as the criterion value. Two procedures were used to calculate &OV0312;o2in the open flow system: MCO2(where O2and CO2were measured in mixed expired gas) and MO2(O2measured only). &OV0312;o2was measured in ten human subjects during three continuous incremental cycling tests to peak power output administered on three separate occasions—once using each of the three procedures. The results indicated a relatively small difference in &OV0312;o2between the Rv and MCO2procedures (6.2 ± 4.5%) and between the Rv and MO2procedures (3.7 ± 1.7%), across a broad range of power outputs (40–100% &OV0312;o2peak). The difference between the Rv and MCO2procedures decreased as power output increased, while that between the Rv and MO2procedures remained relatively constant. Therefore, the open flow method is shown to be a valid and reproducible technique for assessment of the metabolic activity of humans and animals.

ISSN:0195-9131    

出版商:OVID    

年代:1989

数据来源: OVID

ISSN:0195-9131    

出版商:OVID    

年代:1989

数据来源: OVID

ISSN:0195-9131    

出版商:OVID    

年代:1989

数据来源: OVID