Chrif Farouk, Nef Tobias, Hunt Kenneth J
Institute for Rehabilitation and Performance Technology, Division of Mechanical Engineering, Department of Engineering and Information Technology, Bern University of Applied Sciences, Burgdorf, CH-3400 Switzerland.
Gerontechnology and Rehabilitation Research Group, ARTORG Center for Biomedical Engineering Research, University of Bern, Bern, CH-3008 Switzerland.
BMC Biomed Eng. 2019 Oct 3;1:26. doi: 10.1186/s42490-019-0025-9. eCollection 2019.
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.
腿部推举装置是用于下肢肌肉骨骼强化训练最广泛使用的工具之一，并且已证明对健康人群和患者群体具有重要的心肺益处。通过集成力和运动传感器、功率计算以及用于自主工作率控制的视觉反馈系统，对动态腿部推举装置进行了进一步的工程开发以用于工作率估计。本研究旨在评估增强型动态腿部推举装置在恒负荷训练和高强度间歇训练中用于心肺运动训练的可行性。五名年龄在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课程：恒负荷训练和高强度间歇训练。参与者在与他们恒负荷训练的第一通气阈值以及高强度间歇训练的第二通气阈值相对应的工作率下进行训练课程。
所有参与者都耐受这两种训练方案，并且能够毫无并发症地完成训练课程。观察到了显著的心肺反应。在恒负荷训练期间，平均摄氧量与目标摄氧量之间的差异为0.07±0.34升/分钟（103±17%），在高强度间歇训练期间为0.35±0.66升/分钟（113±27%）。在恒负荷训练期间，平均心率与目标心率之间的差异为-7±19次/分钟（94±15%），在高强度间歇训练期间为4.2±16次/分钟（103±12%）。
发现增强型动态腿部推举装置对于心肺运动训练以及基于通气阈值为不同训练方案制定运动处方是可行的。
