The Interaction of Treadmill Type and Incline Slope on Biomechanics and Muscle Activation During Human Locomotion.

Q1 Health Professions

International journal of exercise science Pub Date : 2024-12-01 eCollection Date: 2024-01-01 DOI:10.70252/GMWV8349

Rohit Kundu, Taj Krieger, Ricardo Sanchez, D E Lankford

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引用次数: 0

Abstract

To investigate the effects of differing treadmills on impact acceleration and muscle activation.

Methods: 15 males and 7 females (27.8 ± 7.7yrs), engaged in two sessions of high-incline walking (HIW), and low-incline jogging (LIJ) on different deck systems (cushioned) treadmills (TM1 and TM2). Sessions lasted 5-minutes, and participants maintained a self-selected pace matched for each session. EMG markers were placed over the Tibialis Anterior (TA), Soleus (SOL), Lateral Gastrocnemius (LG), Biceps Femoris (BF), Gluteus Maximus (GM), Anterior Deltoid (AD), Vastus Lateralis (VL), and the Erector Spinae (ES). Trident Inertial Measurement Units (IMU) were attached to the foot and sacrum. EMG activity, impact accelerations, heart rate, and RPE were collected at the 4-minute 30-seconds mark.

Results: Peak EMG was higher for LG (p = 0.005), SOL (p = 0.010), and BF (p < 0.001) on TM1 compared to TM2, while AD exhibited lower peak activation during HIW compared to LIJ on TM2 (p = 0.010). The integral EMG activity increased for AD, ES, VL, SOL, LG, and GM only during HIW for both TM1 and TM2. However, only integral EMG activation of BF and LG differed between TM1 and TM2 during HIW. Foot and sacrum resultant acceleration was notably lower during HIW compared to LIJ on both TM1 and TM2. HR was significantly higher on TM1 (171.2 ± 24.8bpm) compared to TM2 (164.62 ± 23.7 bpm, p < .05) during HIW (p < .001), and RPE also differed between TM1 (13.96 ± 1.96) and TM2 (13.09 ± 1.97) during HIW (p < .05).

Conclusion: At the same speed (correspond to an RPE of 11) and grade, treadmill design may impact peak and integral muscle EMG patterns, RPE, and HR responses.

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跑步机类型和坡度对人体运动过程中生物力学和肌肉活动的影响。

研究不同跑步机对冲击加速和肌肉激活的影响。方法：男性15例，女性7例（27.8±7.7岁），在不同的甲板系统（缓冲）跑步机（TM1和TM2）上进行高倾斜度步行（HIW）和低倾斜度慢跑（LIJ）两组。每个疗程持续5分钟，参与者在每个疗程中保持自己选择的节奏。肌电标记放置在胫骨前肌（TA）、比目鱼肌（SOL）、腓肠肌外侧肌（LG）、股二头肌（BF）、臀大肌（GM）、三角肌前肌（AD）、股外侧肌（VL）和竖脊肌（ES）上。三叉戟惯性测量单元（IMU）连接在脚和骶骨上。在4分30秒时收集肌电图活动、撞击加速度、心率和RPE。结果：与TM2相比，在TM1上，LG （p = 0.005）、SOL （p = 0.010）和BF （p < 0.001）的肌电信号峰值更高，而在TM2上，AD表现出较低的HIW峰激活（p = 0.010）。AD、ES、VL、SOL、LG和GM的整体肌电活动仅在TM1和TM2的HIW期间增加。然而，在HIW期间，TM1和TM2之间只有BF和LG的整体肌电激活不同。与在TM1和TM2上的LIJ相比，HIW期间足部和骶骨的合成加速度明显较低。HIW期间TM1组的HR（171.2±24.8bpm）明显高于TM2组（164.62±23.7 bpm, p < 0.05）（p < 0.001）， RPE在TM1组（13.96±1.96）与TM2组（13.09±1.97）之间差异有统计学意义（p < 0.05）。结论：在相同的速度（对应于RPE为11）和等级下，跑步机设计可能会影响峰值和整体肌肉肌电图模式、RPE和HR反应。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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