Sports and Exercise Physiology Laboratory, Department of Physiology, University of Calcutta, India.
Biol Sport. 2015 Mar;32(1):59-63. doi: 10.5604/20831862.1127283. Epub 2014 Nov 3.
The present study was conducted to validate the applicability of Cooper's 12-minute run test (CRT) for predicting VO2max in male university students of Kolkata, India, to bypass the exhaustive and complicated protocol of direct estimation of VO2max. Eighty-eight sedentary male university students recruited by simple random sampling from the University of Calcutta, Kolkata, were randomly assigned to the study group (N = 58) and the confirmatory group (N = 30). VO2max of each participant was determined by the direct procedure and the indirect CRT method. The mean value of predicted VO2max (PVO2max) (42.8±4.0 ml · kg(-1) · min(-1) with a range of 33.7-50.9) showed a significant difference with VO2max (39.8±4.0 ml · kg(-1) · min(-1) with a range of 33.5-47.7) in the study group. Limits of agreement between PVO2max and VO2max were large enough (0.10 to 5.94 ml · kg(-1) · min(-1)) with poor confidence intervals indicating inapplicability of the current protocol of CRT in the studied population. The prediction norm [Y = 21.01X - 11.04 (SEE = 0.193 ml · kg(-1) · min(-1))] was computed from the significant correlation (r = 0.93, P < 0.001) between distance covered in CRT and VO2max. Application of this norm in the confirmatory group revealed an insignificant difference between PVO2max and VO2max. The modified equation is recommended for application of CRT as a valid method to evaluate the cardiorespiratory fitness in terms of VO2max in sedentary male Indian youth.
本研究旨在验证库塔卡尔（印度加尔各答市）男性大学生库珀 12 分钟跑步测试（CRT）预测最大摄氧量（VO2max）的适用性，以避免直接估计 VO2max 的繁琐和复杂的方案。通过简单随机抽样，从加尔各答大学招募了 88 名久坐不动的男性大学生，随机分为研究组（N=58）和确认组（N=30）。每位参与者的 VO2max 通过直接程序和间接 CRT 方法确定。预测 VO2max（PVO2max）的平均值（42.8±4.0 ml·kg-1·min-1，范围为 33.7-50.9）与研究组 VO2max（39.8±4.0 ml·kg-1·min-1，范围为 33.5-47.7）有显著差异。PVO2max 和 VO2max 之间的一致性界限（0.10 至 5.94 ml·kg-1·min-1）足够大，置信区间不佳，表明当前 CRT 方案在研究人群中不适用。从 CRT 覆盖的距离与 VO2max 之间的显著相关性（r = 0.93，P <0.001）计算出预测标准 [Y = 21.01X - 11.04（SEE = 0.193 ml·kg-1·min-1）]。在确认组中应用该标准，PVO2max 和 VO2max 之间无显著差异。建议应用该标准，将 CRT 作为一种评估久坐不动的印度青年心肺功能的有效方法，以 VO2max 为依据。
