Kang Seung Rok, Min Jin-Young, Yu Changho, Kwon Tae-Kyu
Department of Healthcare Engineering, Chonbuk National University, Jeonju, Jeonbuk 54896, Korea.
Corporation of Sonicworld, Wonju, Kwangwondo 26365, Korea.
Technol Health Care. 2017 Jul 20;25(S1):115-123. doi: 10.3233/THC-171313.
In this paper, we investigated the recovery of the lactate level, muscular fatigue, and heart rate recovery (HRR) with respect to whole body vibration (WBV) during the rest stage after a gait exercise.
A total of 24 healthy subjects with no medical history of exercise injury participated. The participants were divided into a training group with vibration during rest and a control group with the same conditions but without vibration. The subjects performed a gait exercise with a slope of 15% and velocity of 4 km/h to consume 450 kcal in 30 min. Then, they rested on a vibrating chair or on a chair without vibrations for 30 min. The vibration protocol consists of a frequency of 10 Hz and amplitude of 5 mm. To estimate the recovery effect, we measured the lactate levels in blood, spectral edge frequency (SEF) of MVIC, and HRR before, immediately after exercise, and after rest.
The results showed that the lactate level in the training group decreased more (93.8%) than in the control group (32.8%). Also, HRR showed a similar trend with a recovery of 88.39% in the training group but 64.72% in the control group. We considered that whole-body vibrations during rest would help remove lactic acid by improving the level of lactic acid oxidation with stimulated blood vessels in the muscles and by helping to maintain blood flow. Also, WBV would lead to compensation to actively decrease the fast excess post-exercise oxygen consumption from blood circulation.
We suggest that whole-body vibrations during rest can provide fast, efficient fatigue recovery as a cool down exercise for women, the elderly, and patients without other activity after intense exercise.
在本文中，我们研究了步态运动后休息阶段全身振动（WBV）对乳酸水平、肌肉疲劳和心率恢复（HRR）的影响。
共有24名无运动损伤病史的健康受试者参与。参与者被分为休息时振动的训练组和条件相同但无振动的对照组。受试者以15%的坡度和4公里/小时的速度进行步态运动，在30分钟内消耗450千卡热量。然后，他们在振动椅或无振动的椅子上休息30分钟。振动方案包括频率10赫兹和振幅5毫米。为评估恢复效果，我们在运动前、运动后即刻和休息后测量了血液中的乳酸水平、最大随意等长收缩（MVIC）的频谱边缘频率（SEF）和心率恢复情况。
结果显示，训练组的乳酸水平下降幅度（93.8%）大于对照组（32.8%）。此外，心率恢复情况也呈现类似趋势，训练组的恢复率为88.39%，而对照组为64.72%。我们认为，休息时的全身振动有助于通过刺激肌肉中的血管提高乳酸氧化水平以及帮助维持血流来清除乳酸。此外，全身振动会导致代偿，从而积极减少运动后血液循环中快速过量的耗氧量。
我们建议，休息时的全身振动可为女性、老年人以及剧烈运动后无其他活动的患者提供快速、有效的疲劳恢复，作为一种放松运动。
