Graded exercise testing on a treadmill can be accomplished by increasing speed and/or grade. The purpose of this study was to compare cardiometabolic responses during graded walking and ungraded running. Thirty healthy, active adults (21 females, 9 males; VO 2peak = 39.9 ± 5.4 ml/kg/min) completed two counterbalanced maximal exercise tests (Walk Max & Run Max). Walk tests started at a self-selected brisk speed, increased grade by 2% each minute. Run tests started at 3.5 mph and increased speed by 0.5 mph each minute. Expired gases, HR, overall RPE (RPE-O), legs only RPE (RPE-L), and RER were assessed. Data were analysed using dependent t-tests. Walk Max and Run Max protocols yielded results indicating maximal effort. VO 2 was higher for the Run Max protocol (p .05). RER was also higher for the Walk Max protocol (p .05). Max protocols delivering work by walking and running are both viable and provide options to suit the circumstances and/or preferences of the patient/client. Walk and run protocols can be appropriate for young, healthy, and active individuals. Walk protocols may limit participant anxiety related to falls and thus has the potential to increase exercise self-efficacy. Walk protocols are also an excellent choice when the participant cannot or should not perform a run-based protocol.

中文翻译：

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对最大运动量的心脏代谢和知觉反应：比较分级步行与跑步

跑步机上的分级运动测试可以通过提高速度和/或等级来完成。本研究的目的是比较分级步行和未分级跑步期间的心脏代谢反应。30 名健康、活跃的成年人（21 名女性，9 名男性；VO 2peak = 39.9 ± 5.4 ml/kg/min）完成了两项平衡最大运动测试（Walk Max 和 Run Max）。步行测试以自选的轻快速度开始，每分钟提高 2% 的等级。运行测试以 3.5 英里/小时的速度开始，速度每分钟增加 0.5 英里/小时。评估了过期气体、HR、整体 RPE (RPE-O)、仅腿部 RPE (RPE-L) 和 RER。使用相关 t 检验分析数据。Walk Max 和 Run Max 协议产生的结果表明最大努力。Run Max 方案的 VO 2 更高（p .05）。Walk Max 协议的 RER 也更高（p .05）。通过步行和跑步提供工作的最大协议既可行又提供适合患者/客户的情况和/或偏好的选项。步行和跑步方案适用于年轻、健康和活跃的个体。步行协议可能会限制参与者与跌倒相关的焦虑，因此有可能增加运动自我效能。当参与者不能或不应该执行基于运行的协议时，步行协议也是一个很好的选择。