Whole Body Vibration at Different Exposure Frequencies: Infrared Thermography and Physiological Effects

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±2.6years) 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.

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Occupational Vibration in Urban Bus and Influence on Driver’s Lower Limbs

U Porto Journal of Engineering ◽

10.24840/2183-6493_004.001_0005 ◽

2018 ◽

Vol 4 (1) ◽

pp. 56-66

Author(s):

M. Cvetkovic ◽

J. Santos Baptista ◽

M. A. Pires Vaz

Keyword(s):

Whole Body Vibration ◽

Working Environment ◽

Lower Limbs ◽

Whole Body ◽

Body Vibration ◽

Prisma Statement ◽

Physical Changes ◽

Iso 2631 ◽

The Impact ◽

Whole Body Vibrations

The whole-body vibration occurs in many occupational activities, promoting discomfort in the working environment and inducing a variety of psycho – physical changes where consequences as a permanent dysfunction of certain parts of the organism may occur. The main goal of this short systematic review is finding the articles with the most reliable results relating whole-body vibrations to buses and, to compare them with the results of drivers’ lower limbs musculoskeletal disease which occurs as a consequence of many year exposure. PRISMA Statement Methodology was used and thereby 27 Scientific Journals and 25 Index - Database were searched through where 3996 works were found, of which 24 were included in this paper. As a leading standard for analysis of the whole-body vibration the ISO 2631 – 1 is used, while in some papers as an additional standard the ISO 2631-5 is also used for the sake of better understanding the vibrations. Furthermore, the European Directive 2002/44 / EC is included where a daily action exposure to the whole-body vibrations is exactly deter-mined. All the results presented in the paper were compared with the aforesaid standards. After having searched the databases, papers that deal with research of the impact of the vibration on the driver’s lower limbs did not contain any information’s on the described problem.

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Whole body vibration may have immediate adverse effects on the postural sway of stroke patients

Journal of Physical Therapy Science ◽

10.1589/jpts.28.473 ◽

2016 ◽

Vol 28 (2) ◽

pp. 473-477 ◽

Cited By ~ 4

Author(s):

Ki Jin Hwang ◽

Young Uk Ryu

Keyword(s):

Adverse Effects ◽

Postural Sway ◽

Whole Body Vibration ◽

Whole Body ◽

Stroke Patients ◽

Body Vibration

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The acute effects of different training loads of whole body vibration on flexibility and explosive strength of lower limbs in divers

Biology of Sport ◽

10.5604/20831862.1163373 ◽

2015 ◽

Vol 32 (3) ◽

pp. 235-241 ◽

Cited By ~ 12

Author(s):

George Dallas ◽

Giorgos Paradisis ◽

Paschalis Kirialanis ◽

Vassilis Mellos ◽

Polikseni Argitaki ◽

...

Keyword(s):

Whole Body Vibration ◽

Lower Limbs ◽

Whole Body ◽

Acute Effects ◽

Body Vibration ◽

Explosive Strength

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The Effects of Uni- and Bilateral Fatigue on Postural and Power Tasks

Journal of Applied Biomechanics ◽

10.1123/jab.29.1.44 ◽

2013 ◽

Vol 29 (1) ◽

pp. 44-48 ◽

Cited By ~ 7

Author(s):

Paulo H. Marchetti ◽

Maria I.V. Orselli ◽

Marcos Duarte

Keyword(s):

Lower Limb ◽

Healthy Subjects ◽

Postural Sway ◽

Center Of Pressure ◽

Lower Limbs ◽

Quiet Standing ◽

Ground Reaction Forces ◽

Before And After ◽

Reaction Forces ◽

The Mean

The aim of this study was to investigate the effects of unilateral and bilateral fatigue on both postural and power bipedal tasks. Ten healthy subjects performed two tasks: bipedal quiet standing and a maximal bipedal counter-movement jumping before and after unilateral (with either the dominant or nondominant lower limb) and bilateral (with both lower limbs) fatigue. We employed two force plates (one under each lower limb) to measure the ground reaction forces and center of pressure produced by subjects during the tasks. To quantify the postural sway during quiet standing, we calculated the resultant center of pressure (COP) speed and COP area of sway, as well as the mean weight distribution between lower limbs. To quantify the performance during the countermovement jumping, we calculated the jump height and the peak force of each lower limb. We observed that both unilateral and bilateral fatigue affected the performance of maximal voluntary jumping and standing tasks and that the effects of unilateral and bilateral fatigue were stronger in the dominant limb than in the nondominant limb during bipedal tasks. We conclude that unilateral neuromuscular fatigue affects both postural and power tasks negatively.

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Weight Bearing Through Lower Limbs in a Standing Frame with and Without Arm Support and Low-Magnitude Whole-Body Vibration in Men and Women with Complete Motor Paraplegia

American Journal of Physical Medicine & Rehabilitation ◽

10.1097/phm.0b013e31824aab03 ◽

2012 ◽

Vol 91 (4) ◽

pp. 300-308 ◽

Cited By ~ 8

Author(s):

Kathie A. Bernhardt ◽

Lisa A. Beck ◽

Jeffry L. Lamb ◽

Kenton R. Kaufman ◽

Shreyasee Amin ◽

...

Keyword(s):

Weight Bearing ◽

Whole Body Vibration ◽

Lower Limbs ◽

Whole Body ◽

Men And Women ◽

Body Vibration ◽

Arm Support ◽

Low Magnitude

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Whole-Body Vibration Effects on Bone Before and After Hind-Limb Unloading in Rats

Aviation Space and Environmental Medicine ◽

10.3357/asem.2368.2009 ◽

2009 ◽

Vol 80 (2) ◽

pp. 88-93 ◽

Cited By ~ 20

Author(s):

Pengfei Yang ◽

Bin Jia ◽

Chong Ding ◽

Zhe Wang ◽

Airong Qian ◽

...

Keyword(s):

Hind Limb ◽

Whole Body Vibration ◽

Whole Body ◽

Body Vibration ◽

Before And After ◽

Hind Limb Unloading

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Effects of Whole-Body Vibration-Assisted Training on Lower Limb Blood Flow in Children With Myelomeningocele

Frontiers in Bioengineering and Biotechnology ◽

10.3389/fbioe.2021.601747 ◽

2021 ◽

Vol 9 ◽

Author(s):

Andrzej Szopa ◽

Małgorzata Domagalska-Szopa ◽

Andrzej Siwiec ◽

Ilona Kwiecień-Czerwieniec

Keyword(s):

Blood Flow ◽

Range Of Motion ◽

Lower Limb ◽

Whole Body Vibration ◽

Rehabilitation Program ◽

Functional Mobility ◽

Lower Limbs ◽

Whole Body ◽

Body Vibration ◽

Tibial Arteries

This study investigated the effectiveness of whole-body vibration (WBV) training incorporated into a conventional physiotherapy (PT) program (WBV-assisted training) in improving blood flow in the lower limbs and range of motion in the lower limb joints of children with myelomeningocele (MMC). A total of 31 children with MMC (7–15 years old) underwent a 6 weeks treatment program consisting of 2 weeks of conventional PT followed by 4 weeks of WBV-assisted training. The assessment comprised two parts: evaluation of lower limb joint range of motion and Doppler ultrasonography of the superficial femoral, popliteal, and anterior tibial arteries and was performed three times for each of the participants (at baseline, after 10 sessions of PT but before WBV-assisted training, and after 20 sessions of WBV-assisted training). Our results showed that WBV-assisted training significantly improved lower limb circulation in patients with MMC, increasing velocity and reducing resistivity in all tested arteries. Moreover, WBV-assisted training alleviated lower-extremity contractures, especially of the knee. Thus, WBV-assisted training is effective as an adjunctive rehabilitation program for improving functional mobility in children with MMC.

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The Effects of Different Vibration Frequencies, Amplitudes and Contraction Levels on Lower Limb Muscles during Graded Isometric Contractions Superimposed on Whole Body Vibration Stimulation

10.1101/317602 ◽

2018 ◽

Author(s):

Amit N. Pujari ◽

Richard D. Neilson ◽

Marco Cardinale

Keyword(s):

Muscle Contraction ◽

Isometric Contraction ◽

Whole Body Vibration ◽

Lower Limbs ◽

Whole Body ◽

Emg Activity ◽

Isometric Contractions ◽

Body Vibration ◽

Neuromuscular Activity ◽

Co Activation

AbstractBackgroundIndirect vibration stimulation i.e. whole body vibration or upper limb vibration, has been suggested increasingly as an effective exercise intervention for sports and rehabilitation applications. However, there is a lack of evidence regarding the effects of whole body vibration (WBV) stimulation superimposed to graded isometric contractions superimposed on. For this scope, we investigated the effects of WBV superimposed to graded isometric contractions in the lower limbs on muscle activation. We also assessed the agonist-antagonist co-activation during this type of exercise.Twelve healthy volunteers were exposed to WBV superimposed to graded isometric contractions, at 20, 40, 60, 80 and 100% of the maximum voluntary contractions (V) or just isometric contractions performed on a custom designed horizontal leg press Control (C). Tested stimulation consisted of 30Hzand 50Hz frequencies and 0.5mm and 1.5mm amplitudes. Surface electromyographic activity of Vastus Lateralis (VL), Vastus Medialis (VM) and Biceps Femoris (BF) were measured during V and C conditions. Co-contraction activity of agonist-antagonist muscles was also quantified. The trials were performed in random order.ResultsBoth the prime mover, (VL) and the antagonist, (BF) displayed significantly higher (P < 0.05) EMG activity with the V than the C condition. For both the VL and BF, the increase in mean EMGrms values depended on the frequency, amplitude and muscle contraction level with 50Hz-0.5mm stimulation inducing the largest neuromuscular activity. 50Hz-0.5mm V condition also led to co-activation ratios significantly (P< 0.05) higher at 40, 80 and 100% of MVC than the C condition.ConclusionsOur results show that the isometric contraction superimposed on vibration stimulation leads to higher neuromuscular activity compared to isometric contraction alone in the lower limbs. Compared to the control condition, the vibratory stimulation leads to higher agonist-antagonist co-activation of the muscles around the knee joint in all vibration conditions and effort levels. The combination of vibration magnitude (frequency and amplitude) and the level of muscle contraction affect neuromuscular activity rather than vibration frequency alone. Results of this study suggest that more parameters need to be taken into consideration when designing vibration exercise programs for sports and rehabilitation purposes.

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The Effects of Acute and Long-Term Whole-Body Vibration Training on the Postural Control During Cognitive Task in Patients With Chronic Ankle Instability

Journal of Sport Rehabilitation ◽

10.1123/jsr.2021-0034 ◽

2021 ◽

pp. 1-8

Author(s):

Seyed Abolfazl Tohidast ◽

Rasool Bagheri ◽

Ziaeddin Safavi-Farokhi ◽

Mohammad Khaleghi Hashemian ◽

Cyrus Taghizadeh Delkhosh

Keyword(s):

Postural Control ◽

Postural Stability ◽

Center Of Pressure ◽

Ankle Instability ◽

Lateral Displacement ◽

Whole Body Vibration ◽

Chronic Ankle Instability ◽

Whole Body ◽

Body Vibration ◽

The Mean

Context: Chronic ankle instability (CAI) is a common problem associated with impaired postural stability. Whole-body vibration (WBV) has been developed to improve muscle function and reportedly improves postural stability. The aim of this study was to evaluate the effect of 12 sessions of WBV on postural control during standing postural task in participants with CAI. Design: A controlled clinical trial study. Methods: Sixteen participants with CAI and 16 healthy participants aged between 20 and 40 years included in this study. They received WBV (30-Hz frequency, 3 series of four 45-s exercises with a 45-s rest) for a total of 12 sessions, 2 session per week for 6 weeks. Postural control was assessed by center of pressure (COP) parameters, including mean and SD in the anterior–posterior and medial–lateral displacement during single-leg standing. Assessments were done before and immediately after the first session and after the 12th session of WBV, with opened and closed eyes associated with easy and difficult cognitive tasks. Results: The results showed that the SD of COP displacement in the x-axis was significant in eyes opened and SD of COP displacement in the x- and y-axes were significant between groups in the eyes-opened, and eyes-closed conditions (P < .05). Analysis of variance indicated that the effect of WBV training was significant for the mean of COP displacement in the y-axis. Post hoc indicated that the effect of 12 sessions of WBV on the mean of COP displacement was significant in the CAI group (P < .05). However, the acute effect of WBV was not significant on the COP displacement in all axes (P > .05). Conclusion: Higher postural sway associated with postural cognitive interactions might be considered in the rehabilitation of CAI. Twelve sessions of WBV might induce some improvement in postural control with the method of WBV used in this study.

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