Department of Physical Therapy, School of Allied Health Sciences, University of Phayao, Phayao 56000, Thailand.
Department of Sport Science, University of Innsbruck, A-6020 Innsbruck, Austria.
Sensors (Basel). 2024 Jul 7;24(13):4399. doi: 10.3390/s24134399.
Wearable resistance training is widely applied to enhance running performance, but how different placements of wearable resistance across various body parts influence running efficiency remains unclear. This study aimed to explore the impacts of wearable resistance placement on running efficiency by comparing five running conditions: no load, and an additional 10% load of individual body mass on the trunk, forearms, lower legs, and a combination of these areas. Running efficiency was assessed through biomechanical (spatiotemporal, kinematic, and kinetic) variables using acceleration-based wearable sensors placed on the shoes of 15 recreational male runners (20.3 ± 1.23 years) during treadmill running in a randomized order. The main findings indicate distinct effects of different load distributions on specific spatiotemporal variables (contact time, flight time, and flight ratio, ≤ 0.001) and kinematic variables (footstrike type, < 0.001). Specifically, adding loads to the lower legs produces effects similar to running with no load: shorter contact time, longer flight time, and a higher flight ratio compared to other load conditions. Moreover, lower leg loads result in a forefoot strike, unlike the midfoot strike seen in other conditions. These findings suggest that lower leg loads enhance running efficiency more than loads on other parts of the body.
可穿戴式抗阻训练被广泛应用于提升跑步表现，但不同身体部位的可穿戴式抗阻位置如何影响跑步效率仍不清楚。本研究旨在通过比较五种跑步条件（无负荷、躯干、前臂、小腿各附加 10%自身体重负荷和这些部位的组合），使用加速度传感器（置于鞋上）来评估 15 名男性业余跑步者的运动生物力学（时空、运动学和动力学）变量，来探索可穿戴式抗阻位置对跑步效率的影响。研究结果表明，不同的负荷分布对特定的时空变量（接触时间、腾空时间和腾空比， ≤ 0.001）和运动学变量（触地类型， < 0.001）有明显影响。具体来说，在小腿施加负荷与无负荷跑步的效果相似：与其他负荷条件相比，接触时间更短，腾空时间更长，腾空比更高。此外，小腿负荷会导致前足触地，而其他条件下则是中足触地。这些发现表明，与身体其他部位的负荷相比，小腿负荷能更有效地提升跑步效率。
