Ward T E, Hart C L, McKeown B C, Kras J
Department of Health and Physical Education, Texas A&M University-Commerce 75429, USA.
J Sports Med Phys Fitness. 1998 Jun;38(2):132-7.
To investigate heart rate (HR) and relative oxygen consumption (VO2) measures during two modes (walking or running stages four) of the Bruce treadmill protocol.
Male volunteers (n = 27), ranging in age from 25 to 56 years (M = 39.1 +/- 10.7 yrs).
S's performed to volitional fatigue on the two randomly assigned treadmill tests.
HR and VO2 were taken each minute and at point of exhaustion.
Dependent "t"-tests revealed a significantly (p < or = 0.05) difference between the protocols at 11 minutes (running = 46.7 +/- 3.9 > walking = 44.6 +/- 3.7 ml[kg.min-1]) and at 12 minutes (running = 49.3 +/- 4.1 > walking = 47.6 +/- 3.5 ml[kg.min-1]) on the VO2 values. A significant differences was noted on HR at 11 minutes (running = 158.1 +/- 13.5 > walking = 156.0 +/- 13.0 bpm) and at 12 minutes (running = 160.4 +/- 11.0 > walking = 157.8 +/- 11.4 bpm) between the protocols. The two-way ANOVA technique revealed no significant differences or interactions on VO2 or HR between younger (< 45 yrs) and older (> or = 45 yrs) subjects during either protocol. A one-way ANCOVA indicated no significant differences between taller and shorter subjects on VO2 during the fourth stage of the Bruce protocol. The correlations, between the two protocols, for HR were strong but were weaker and inconsistent for VO2. The repeated measures ANOVA indicated significant within subject variability between test administrations.
When testing endurance trained males, modality, age and height are not factors in differences of VO2 values during the 4th stage of the Bruce treadmill test but learning effect could be.
研究在布鲁斯跑步机方案的两种模式（步行或跑步第四阶段）期间的心率（HR）和相对耗氧量（VO2）测量值。
男性志愿者（n = 27），年龄范围为25至56岁（M = 39.1±10.7岁）。
受试者在两项随机分配的跑步机测试中进行至自愿疲劳。
每分钟以及在力竭点时测量HR和VO2。
相关的“t”检验显示，在第11分钟（跑步= 46.7±3.9＞步行= 44.6±3.7 ml[kg·min-1]）和第12分钟（跑步= 49.3±4.1＞步行= 47.6±3.5 ml[kg·min-1]）时，两种方案的VO2值之间存在显著差异（p≤0.05）。在第11分钟（跑步= 158.1±13.5＞步行= 156.0±13.0次/分钟）和第12分钟（跑步= 160.4±11.0＞步行= 157.8±11.4次/分钟）时，两种方案的HR之间也存在显著差异。双向方差分析技术显示，在任何一种方案中，年轻（＜45岁）和年长（≥45岁）受试者之间在VO2或HR方面均无显著差异或相互作用。单向协方差分析表明，在布鲁斯方案的第四阶段，身高较高和较矮的受试者在VO2方面无显著差异。两种方案之间，HR的相关性很强，但VO2的相关性较弱且不一致。重复测量方差分析表明，测试管理之间存在显著的受试者内变异性。
在对耐力训练的男性进行测试时，方式、年龄和身高不是布鲁斯跑步机测试第四阶段VO2值差异的因素，但学习效应可能是。
