Cardiac Rehabilitation and Prevention Program, Public Health Department, AUSL Ferrara, Italy (Drs Grazzi and Mazzoni); Center of Biomedical Studies Applied to Sport, University of Ferrara, Italy (Drs Grazzi, Conconi, and Mazzoni and Mr Lordi); Department of Public Health, AUSL Piacenza, Italy (Dr Chiaranda); Veterans Affairs Palo Alto Health Care System, and Stanford University School of Medicine, California (Dr Myers); and Division of Cardiology, "Delta" Hospital, AUSL Ferrara, Italy (Dr Pasanisi).
J Cardiopulm Rehabil Prev. 2017 Sep;37(5):347-349. doi: 10.1097/HCR.0000000000000266.
The aim of this study was to determine whether the 1-km treadmill walking test, previously developed to predict peak oxygen uptake ((Equation is included in full-text article.)O2peak) in stable cardiac outpatients, could be reproduced outdoors.
Fifty male cardiac outpatients performed the 1-km walking test on a treadmill and on a flat track within 1 week. (Equation is included in full-text article.)O2peak was estimated for both testing conditions considering age, height, weight, walking speed, and heart rate.
Average walking speed was slightly higher during outdoor conditions (5.73 ± 0.77 km/h vs 5.55 ± 0.84 km/h), whereas mean heart rates were similar for both testing conditions (102 ± 18 beats/min vs 103 ± 16 beats/min). (Equation is included in full-text article.)O2peak values for treadmill and outdoor tests were not significantly different (26.4 ± 4.1 mL/kg/min vs 26.8 ± 4.5 mL/kg/min) and were strongly correlated (r = 0.93, P < .0001). The slope and the intercept of the (Equation is included in full-text article.)O2peak values were not different from the line of identity.
This moderate and perceptually regulated 1-km walking test administered outdoors gives similar results compared with a similar test performed on a treadmill. Therefore, (Equation is included in full-text article.)O2peak can be reasonably estimated using both testing modalities. This suggests that the outdoor 1-km test can be applied for indirect estimations of cardiorespiratory fitness in an outpatient setting.
本研究旨在确定之前开发的用于预测稳定型心脏门诊患者峰值摄氧量（（方程式包含在全文中）O2peak）的 1 公里跑步机步行测试是否可以在户外重现。
50 名男性心脏门诊患者在一周内分别在跑步机和平地上进行 1 公里步行测试。考虑到年龄、身高、体重、步行速度和心率，两种测试条件下都估计了（方程式包含在全文中）O2peak。
户外条件下的平均步行速度略高（5.73 ± 0.77 km/h 与 5.55 ± 0.84 km/h），而两种测试条件下的平均心率相似（102 ± 18 次/分与 103 ± 16 次/分）。跑步机和户外测试的（方程式包含在全文中）O2peak 值没有显著差异（26.4 ± 4.1 mL/kg/min 与 26.8 ± 4.5 mL/kg/min），且相关性很强（r = 0.93，P <.0001）。（方程式包含在全文中）O2peak 值的斜率和截距与身份线没有差异。
这种适度且感知调节的 1 公里户外步行测试与在跑步机上进行的类似测试相比，结果相似。因此，两种测试方式都可以合理地估计（方程式包含在全文中）O2peak。这表明，户外 1 公里测试可用于门诊环境中对心肺适能的间接估计。
