Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, Champaign, IL, USA.
College of Physical Education and Sports, Beijing Normal University, Beijing, China.
Biorheology. 2021;58(1-2):39-49. doi: 10.3233/BIR-201011.
Local vibration has shown promise in improving skin blood flow and wound healing. However, the underlying mechanism of local vibration as a preconditioning intervention to alter plantar skin blood flow after walking is unclear.
The objective was to use wavelet analysis of skin blood flow oscillations to investigate the effect of preconditioning local vibration on plantar tissues after walking.
A double-blind, repeated measures design was tested in 10 healthy participants. The protocol included 10-min baseline, 10-min local vibrations (100 Hz or sham), 10-min walking, and 10-min recovery periods. Skin blood flow was measured over the first metatarsal head of the right foot during the baseline and recovery periods. Wavelet amplitudes after walking were expressed as the ratio of the wavelet amplitude before walking.
The results showed the significant difference in the metabolic (vibration 10.06 ± 1.97, sham 5.78 ± 1.53, p < 0.01) and neurogenic (vibration 7.45 ± 1.54, sham 4.78 ± 1.22, p < 0.01) controls. There were no significant differences in the myogenic, respiratory and cardiac controls between the preconditioning local vibration and sham conditions.
Our results showed that preconditioning local vibration altered the normalization rates of plantar skin blood flow after walking by stimulating the metabolic and neurogenic controls.
局部振动已被证明可以改善皮肤血流和伤口愈合。然而，局部振动作为一种预处理干预措施来改变步行后足底皮肤血流的潜在机制尚不清楚。
本研究旨在使用皮肤血流振荡的小波分析来探讨预处理局部振动对步行后足底组织的影响。
10 名健康参与者采用双盲、重复测量设计进行测试。方案包括 10 分钟基线期、10 分钟局部振动（100Hz 或假振动）、10 分钟步行期和 10 分钟恢复期。在基线期和恢复期，测量右脚第一跖骨头的皮肤血流。步行后的小波幅度表示为步行前小波幅度的比值。
结果显示代谢（振动 10.06 ± 1.97，假振动 5.78 ± 1.53，p < 0.01）和神经源性（振动 7.45 ± 1.54，假振动 4.78 ± 1.22，p < 0.01）控制之间存在显著差异。预处理局部振动和假振动条件之间，肌源性、呼吸和心源性控制之间无显著差异。
我们的结果表明，预处理局部振动通过刺激代谢和神经源性控制，改变了步行后足底皮肤血流的正常化率。
