Wang S C, Lin H F, Wu C F, Lin B N, Wang Y S, Huang Y J
National Chung Cheng University, Graduate Institute of Sport and Leisure Science, Min-Hsiung, Chia-Yi County, Taiwan.
J Sports Med Phys Fitness. 2010 Mar;50(1):32-6.
This study evaluated the reliability and validity of a proposed 10 min running speed variance test (RSVHRC) in assessing aerobic power at which the intensity was controlled at 80% of age-predicted maximal heart rate (HR).
Forty-four college students (21 men and 23 women, age: 21+/-3 years, height: 166.6+/-7.9 cm, weight: 61.7+/-9.3 kg) were recruited to undergo 2 RSVHRC test trials, and a maximal exercise test at least 24 hours apart. The test consisted of a 3-min warm-up at 1.67 km/h, followed by adjusting speed up to either at 2.5 m/s or 2.78 m/s immediately depending upon onset HR after the warm-up. HR was monitored every 30 seconds and running speed was adjusted accordingly to maintain HR (+/-5bpm) for 10 minutes. RSVHRC was determined by the slope of distance/time relationship from 3rd to 10th min.
Pair t-test showed that there was no significant difference between 1st (2.38+/-0.58 m/s) and 2nd trial (2.40+/-0.63 m/s). Intraclass correlation coefficient (ICC) score showed that RSVHRC was highly reliable (ICC=0.98, 95% CI=0.97-0.99). Coefficient of variation, standard error of measurement (SEM), and %SEM were 4.8%, 0.12 m/s, 5.02% respectively. Additionally, a Pearson product-moment correlation coefficient demonstrated 2 trials were correlated with maximal oxygen uptake (46.6+/-8.1 mL/kg/min) at r=0.74, 0.71 (P<0.05).
In conclusion, 80%HRmax RSVHRC is an easy and highly reliable submaximal exercise test that provides good validity to assess aerobic power in young and healthy population, which can be applied on treadmill setting.
本研究评估了一项提议的10分钟跑步速度方差测试（RSVHRC）在评估有氧能力方面的可靠性和有效性，该测试强度控制在年龄预测最大心率（HR）的80%。
招募了44名大学生（21名男性和23名女性，年龄：21±3岁，身高：166.6±7.9厘米，体重：61.7±9.3千克），进行2次RSVHRC测试试验，并至少间隔24小时进行一次最大运动测试。测试包括以1.67千米/小时的速度进行3分钟热身，然后根据热身开始后的心率立即将速度调整到2.5米/秒或2.78米/秒。每30秒监测一次心率，并相应调整跑步速度以维持心率（±5次/分钟）10分钟。RSVHRC由第3至10分钟的距离/时间关系斜率确定。
配对t检验显示第一次试验（2.38±0.58米/秒）和第二次试验（2.40±0.63米/秒）之间无显著差异。组内相关系数（ICC）得分显示RSVHRC具有高度可靠性（ICC = 0.98，95%可信区间 = 0.97 - 0.99）。变异系数、测量标准误差（SEM）和%SEM分别为4.8%、0.12米/秒、5.02%。此外，皮尔逊积差相关系数表明两次试验与最大摄氧量（46.6±8.1毫升/千克/分钟）相关，r值分别为0.74、0.71（P<0.05）。
总之，80%HRmax的RSVHRC是一项简单且高度可靠的次最大运动测试，在评估年轻健康人群的有氧能力方面具有良好的有效性，可应用于跑步机设置。
