Post-Graduate Program in Rehabilitation Sciences, Augusto Motta University Center (UNISUAM), Rio de Janeiro, Brazil.
Post-Graduate Program in Exercise Science and Sports, University of Rio de Janeiro State, Rio de Janeiro, Brazil.
J Strength Cond Res. 2019 Jul;33(7):1954-1962. doi: 10.1519/JSC.0000000000002079.
Guimarães, GC, Farinatti, PTV, Midgley, AW, Vasconcellos, F, Vigário, P, and Cunha, FA. Relationship between percentages of heart rate reserve and oxygen uptake reserve during cycling and running: a validation study. J Strength Cond Res 33(7): 1954-1962, 2019-This study investigated the relationship between percentages of heart rate reserve (%HRR) and oxygen uptake reserve (%VO2R) during a cardiopulmonary exercise test (CPET) and discrete bouts of isocaloric cycling and treadmill running. Thirty men visited the laboratory 3 times for anthropometrical and resting VO2 assessments, and perform cycling and running CPETs. Ten men visited the laboratory twice more to investigate the validity of the %HRR-%VO2R relationships during isocaloric bouts of cycling and running at 75% VO2R with energy expenditures of 400 kcals. The %HRR was significantly higher than the %VO2R during both CPETs at all exercise intensities (p < 0.001). During isocaloric exercise bouts, mean %HRR-%VO2R differences of 6.5% and 7.0% were observed for cycling and running, respectively (p = 0.007-p < 0.001). The %HRR and %VO2R increased over time (p < 0.001), the rate of which was influenced by exercise modality (p < 0.001). On average, heart rate was 5 (p = 0.007) and 8 (p < 0.001) b·min higher than predicted from the second energy expenditure quartile for cycling and running, respectively; however, observed VO2 was lower than predicted during all quartiles for cycling, and the first quartile for running. Consequently, time to achieve the target energy expenditure was greater than predicted (p < 0.01). In conclusion, the %HRR-%VO2R relationship observed during CPET data did not accurately transpose to prolonged isocaloric bouts of cycling and running. In addition, power outputs and speeds defined by the American College of Sports Medicine equations for cycling and running, respectively, overestimated VO2 and energy expenditure.
吉马良斯，GC，法里纳蒂，PTV，米德格利，AW，瓦斯康塞洛斯，F，维加里奥，P，和库尼亚，FA。在骑自行车和跑步时，心率储备百分比与摄氧量储备百分比之间的关系：一项验证研究。J 力量与调节研究 33（7）：1954-1962，2019-本研究调查了心肺运动测试（CPET）期间心率储备百分比（%HRR）和摄氧量储备百分比（%VO2R）与等热量自行车和跑步机跑步的离散回合之间的关系。30 名男性 3 次前往实验室进行人体测量和休息时 VO2 评估，并进行自行车和跑步 CPET。10 名男性两次前往实验室，以研究在 75%VO2R 的等热量回合中，能量消耗为 400 千卡时，%HRR-%VO2R 关系在自行车和跑步中的有效性。在所有运动强度下，CPET 期间的 %HRR 均显著高于 %VO2R（p < 0.001）。在等热量运动回合中，观察到自行车和跑步的平均 %HRR-%VO2R 差异分别为 6.5%和 7.0%（p = 0.007-p < 0.001）。%HRR 和 %VO2R 随时间增加（p < 0.001），运动方式影响其增加率（p < 0.001）。平均而言，与预测值相比，自行车的心率高 5（p = 0.007）和 8（p < 0.001）个 b·min，而跑步时的心率高 8（p < 0.001）个 b·min；然而，在所有四分位数中，观察到的 VO2 均低于预测值，而在跑步的第一个四分位数中，观察到的 VO2 低于预测值。因此，达到目标能量消耗的时间大于预测值（p < 0.01）。总之，CPET 数据中观察到的%HRR-%VO2R 关系不能准确地转化为延长的等热量自行车和跑步回合。此外，美国运动医学学院分别为自行车和跑步定义的功率输出和速度，高估了 VO2 和能量消耗。
