Sonza Anelise, Robinson Caroline C, Achaval Matilde, Zaro Milton A
Programa de Pós-Graduação em Neurociências, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Sarmento Leite, 500, 90050-170 Porto Alegre, RS, Brazil ; Programa de Pós-Graduação em Ciências da Saúde, Universidade Federal de Ciências da Saúde de Porto Alegre, Sarmento Leite, 245, 90050-170 Porto Alegre, RS, Brazil.
Programa de Pós-Graduação em Ciências da Saúde, Universidade Federal de Ciências da Saúde de Porto Alegre, Sarmento Leite, 245, 90050-170 Porto Alegre, RS, Brazil.
ScientificWorldJournal. 2015;2015:452657. doi: 10.1155/2015/452657. Epub 2015 Jan 14.
The aim of this study was to investigate the effects of whole body vibration (WBV) on physiological parameters, cutaneous temperature, tactile sensitivity, and balance. Twenty-four healthy adults (25.3 ± 2.6 years) participated in four WBV sessions. They spent 15 minutes on a vibration platform in the vertical mode at four different frequencies (31, 35, 40, and 44 Hz) with 1 mm of amplitude. All variables were measured before and after WBV exposure. Pressure sensation in five anatomical regions and both feet was determined using Von Frey monofilaments. Postural sway was measured using a force plate. Cutaneous temperature was obtained with an infrared camera. WBV influences the discharge of the skin touch-pressure receptors, decreasing sensitivity at all measured frequencies and foot regions (P ≤ 0.05). Regarding balance, no differences were found after 20 minutes of WBV at frequencies of 31 and 35 Hz. At 40 and 44 Hz, participants showed higher anterior-posterior center of pressure (COP) velocity and length. The cutaneous temperature of the lower limbs decreased during and 10 minutes after WBV. WBV decreases touch-pressure sensitivity at all measured frequencies 10 min after exposure. This may be related to the impaired balance at higher frequencies since these variables have a role in maintaining postural stability. Vasoconstriction might explain the decreased lower limb temperature.
本研究的目的是调查全身振动（WBV）对生理参数、皮肤温度、触觉敏感性和平衡的影响。24名健康成年人（25.3±2.6岁）参加了四次WBV训练。他们在振动平台上以垂直模式在四个不同频率（31、35、40和44赫兹）下振动15分钟，振幅为1毫米。在WBV暴露前后测量所有变量。使用冯·弗雷单丝测定五个解剖区域和双脚的压力感觉。使用测力板测量姿势摆动。用红外热像仪获取皮肤温度。WBV影响皮肤触觉压力感受器的放电，在所有测量频率和足部区域降低敏感性（P≤0.05）。关于平衡，在31和35赫兹频率下进行20分钟的WBV后未发现差异。在40和44赫兹时，参与者表现出更高的前后压力中心（COP）速度和长度。在WBV期间和之后10分钟，下肢的皮肤温度下降。WBV在暴露10分钟后降低了所有测量频率下的触觉压力敏感性。这可能与较高频率下平衡受损有关，因为这些变量在维持姿势稳定性方面起作用。血管收缩可能解释了下肢温度下降的原因。
