Alhowikan Abdulrahman Mohammed, Alfaifi Abdullah, Almutairi Badr, Alzamil Omar, Aleid Muath
Tunis Med. 2016 Dec;94(12):879.
The six-minute walk test (6MWT) is one of the most common exercise tests and is used to estimate the level of physical fitness. This study aimed to evaluate the feasibility of the beat-to-beat heart rate 6MWT slope (6MWTS) and recovery slope for predicting and estimating the level of physical fitness during 6MWT, instead of depending on the distance covered during the test.
Seventy healthy adult male subjects aged 18 to 27 years were recruited randomly from the general Saudi population in Riyadh. Using a 50-m corridor, 6MWT was performed according to standardised American Thoracic Society guidelines.
The mean distance walked in 6 minutes (470.5±64.6 m) and beat-to-beat heart rate (HR) were calculated using a HR monitor. In addition, the body mass index, body surface area, Borg Rating of Perceived Exertion, and maximum predicted HR percentage were also calculated. A stepwise regression equation was used to predict the 6MWT distance (6MWTD), 6MWTS, and recovery slope. There was a significant correlation between 6MWTS and the recovery slope (r= -0.575, p<0.001), between 6MWTS and 6MWTD (r= 0.414, p<0.001), and between recovery slope and 6MWTD (r= -0.454, p<0.001).
Our findings suggest that both 6MWTS and recovery slope can predict 6MWTD.
六分钟步行试验（6MWT）是最常见的运动试验之一，用于评估体能水平。本研究旨在评估逐搏心率6MWT斜率（6MWTS）和恢复斜率在预测和评估6MWT期间体能水平方面的可行性，而非依赖于试验期间行走的距离。
从利雅得的沙特普通人群中随机招募了70名年龄在18至27岁之间的健康成年男性受试者。使用一条50米长的走廊，按照美国胸科学会的标准化指南进行6MWT。
使用心率监测器计算6分钟内行走的平均距离（470.5±64.6米）和逐搏心率（HR）。此外，还计算了体重指数、体表面积、博格自觉用力评分和最大预测心率百分比。使用逐步回归方程预测6MWT距离（6MWTD）、6MWTS和恢复斜率。6MWTS与恢复斜率之间存在显著相关性（r = -0.575，p < 0.001），6MWTS与6MWTD之间存在显著相关性（r = 0.414, p < 0.001），恢复斜率与6MWTD之间存在显著相关性（r = -0.454, p < 0.001）。
我们的研究结果表明，6MWTS和恢复斜率均可预测6MWTD。
