Leg-press devices are one of the most widely used training tools for musculoskeletal strengthening of the lower-limbs, and have demonstrated important cardiopulmonary benefits for healthy and patient populations. Further engineering development was done on a dynamic leg-press for work-rate estimation by integrating force and motion sensors, power calculation and a visual feedback system for volitional work-rate control. This study aimed to assess the feasibility of the enhanced dynamic leg press for cardiopulmonary exercise training in constant-load training and high-intensity interval training. Five healthy participants aged 31.0±3.9 years (mean ± standard deviation) performed two cardiopulmonary training sessions: constant-load training and high-intensity interval training. Participants carried out the training sessions at a work rate that corresponds to their first ventilatory threshold for constant-load training, and their second ventilatory threshold for high-intensity interval training. All participants tolerated both training protocols, and could complete the training sessions with no complications. Substantial cardiopulmonary responses were observed. The difference between mean oxygen uptake and target oxygen uptake was 0.07±0.34 L/min (103 ±17%) during constant-load training, and 0.35±0.66 L/min (113 ±27%) during high-intensity interval training. The difference between mean heart rate and target heart rate was −7±19 bpm (94 ±15%) during constant-load training, and 4.2±16 bpm (103 ±12%) during high-intensity interval training. The enhanced dynamic leg press was found to be feasible for cardiopulmonary exercise training, and for exercise prescription for different training programmes based on the ventilatory thresholds.

中文翻译：

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使用重新设计的动态腿举机进行恒定负荷和高强度间歇训练进行心肺调节的技术可行性。


压腿装置是最广泛使用的增强下肢肌肉骨骼的训练工具之一，并且已证明对健康和患者人群具有重要的心肺益处。通过集成力和运动传感器、功率计算和用于意志工作率控制的视觉反馈系统，对用于估计工作率的动态腿举进行了进一步的工程开发。本研究旨在评估增强动态压腿在恒负荷训练和高强度间歇训练中进行心肺运动训练的可行性。 5名年龄为31.0±3.9岁（平均值±标准差）的健康参与者进行了两次心肺训练：恒负荷训练和高强度间歇训练。参与者以与恒负荷训练的第一通气阈值和高强度间歇训练的第二通气阈值相对应的工作速率进行训练。所有参与者都能耐受这两种训练方案，并且可以顺利完成训练课程。观察到明显的心肺反应。恒负荷训练时平均摄氧量与目标摄氧量之差为0.07±0.34L/min（103±17%），高强度间歇训练时为0.35±0.66L/min（113±27%）。恒定负荷训练期间平均心率与目标心率之间的差异为-7±19 bpm (94 ±15%)，高强度间歇训练期间平均心率与目标心率之间的差异为4.2±16 bpm (103 ±12%)。研究发现，增强动态压腿对于心肺运动训练以及基于通气阈值的不同训练计划的运动处方是可行的。