Barbosa e Silva Odwaldo, Sobral Filho Dário C
Prontocor/Hospital do Coração, Recife, PE, Brazil.
Arq Bras Cardiol. 2003 Jul;81(1):48-53, 42-7. doi: 10.1590/s0066-782x2003000900004. Epub 2003 Jul 31.
To suggest criteria to guide protocol prescription in ramp treadmill testing, according to sex and age, based on velocity, inclination, and max VO2 reached by the population studied.
Prospective study describing heart rate (HR), time, velocity, inclination, and VO2 estimated at maximum effort of 1840 individuals from 4 to 79 years old, who performed a treadmill test (TT) according to the ramp protocol. A paired Student t test was used to assess the difference between predicted and reached max VO2, calculated according to the formulas of the "American College of Sports Medicine".
Submaximal HR was surpassed in 90.1% of the examinations, with a mean time of 10.0 2.0 minute. Initial and peak inclination velocity of the exercise and max VO2 were inversely proportional to age and were greater in male patients. Predicted Max VO2 was significantly lower than that reached in all patients, except for female children and adolescents (age < 20 years old).
Use of velocity, inclination, and maximum VO2 actually reached, as a criterion in prescribing the ramp protocol may help in the performance of exercise in treadmill testing. The ramp protocol was well accepted in all age groups and sexes with exercise time within the programmed 8 to 12 minutes.
根据所研究人群的速度、坡度和达到的最大摄氧量，按性别和年龄提出指导斜坡式跑步机测试方案制定的标准。
前瞻性研究，描述了1840名4至79岁个体在按照斜坡方案进行跑步机测试（TT）时，最大努力状态下的心率（HR）、时间、速度、坡度和估计的摄氧量。采用配对t检验评估根据“美国运动医学学院”公式计算的预测最大摄氧量与实际达到的最大摄氧量之间的差异。
90.1%的测试中达到了次最大心率，平均时间为10.0±2.0分钟。运动的初始和峰值坡度速度以及最大摄氧量与年龄成反比，男性患者更高。除女童和青少年（年龄<20岁）外，所有患者的预测最大摄氧量均显著低于实际达到的最大摄氧量。
将实际达到的速度、坡度和最大摄氧量作为制定斜坡方案的标准，可能有助于跑步机测试中的运动表现。斜坡方案在所有年龄组和性别中都被很好地接受，运动时间在设定的8至12分钟内。
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