Modulation of Cortical Activity by High-Frequency Whole-Body Vibration Exercise: An fNIRS Study

Context: Whole-body vibration (WBV) has shown many positive effects on the human body in rehabilitation and clinical settings in which vibration has been used to elicit muscle contractions in spastic and paretic muscles. Objective: The purpose of this study was to investigate whether WBV exercise (WBVe) differently modulates the cortical activity associated with motor and prefrontal function based on its frequency. Methods: A total of 18 healthy male adults (mean age: 25.3 [2.4] y) participated in this study and performed WBVe (Galileo Advanced plus; Novotec Medical, Pforzheim, Germany) under 3 different vibration frequency conditions (4-mm amplitude with 10-, 20-, and 27-Hz frequencies) and a control condition (0-mm amplitude with 0-Hz frequency). Each condition consisted of 2 alternating tasks (squatting and standing) every 30 seconds for 5 repetitions. All subjects performed the 4 conditions in a randomized order. Main Outcome Measure: Cortical activation during WBVe was measured by relative changes in oxygenated hemoglobin concentration over the primary motor cortex, premotor cortex, supplementary motor area, and prefrontal and somatosensory cortices using functional near-infrared spectroscopy. Results: Oxygenated hemoglobin concentration was higher during the 27-Hz vibration condition than the control and 10-Hz vibration conditions. Specifically, these changes were pronounced in the bilateral primary motor cortex (P < .05) and right prefrontal cortex (P < .05). In contrast, no significant changes in oxygenated hemoglobin concentration were observed in any of the cortical areas during the 10-Hz vibration condition compared with the control condition. Conclusion: This study provides evidence that the motor network and prefrontal cortical areas of healthy adult males can be activated by 27-Hz WBVe. However, WBVe at lower frequencies did not induce significant changes in cortical activation.

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Faculty Opinions recommendation of Modulation of Cortical Activity by High-Frequency Whole-Body Vibration Exercise: An fNIRS Study.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.738078569.793575263 ◽

2020 ◽

Author(s):

Eddy van der Zee

Keyword(s):

High Frequency ◽

Whole Body Vibration ◽

Cortical Activity ◽

Whole Body ◽

Body Vibration ◽

Vibration Exercise

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Acute effects of whole body vibration on functional capabilities of skeletal muscle (Los efectos agudos de la vibración corporal total sobre las capacidades funcionales del músculo esquelético)

Retos ◽

10.47197/retos.v0i27.34373 ◽

2015 ◽

pp. 180-183

Author(s):

James D. Burns ◽

Paul C. Miller ◽

Eric E. Hall

Keyword(s):

Vertical Jump ◽

Anaerobic Power ◽

Whole Body Vibration ◽

Average Power ◽

Peak Torque ◽

Whole Body ◽

Body Vibration ◽

Vibration Condition ◽

The Impact ◽

Athlete Group

The focus of this research was to evaluate the effect whole body vibration (WBV) on measures of muscular contractile function. In addition, this research was conducted to compare the effects of WBV on athletes versus non-athletes. Nineteen male, non-athlete college students, as well as eighteen male Division I collegiate athletes participated in this research. All participants completed 2 conditions, vibration and no vibration, in a randomized order. Participants were exposed to either a 2-minute bout of vibration or a 2-minute no vibration condition. Immediately following both conditions, participants were tested for peak vertical jump height, isokinetic peak torque and average power of knee extensors and flexors, and anaerobic power during a 30-second maximal effort cycle task. Results showed a significant improvement in knee flexion peak torque at 6.28 rad·sec-1 in the athlete group following the vibration condition. Results also showed a trend toward a significant improvement in knee extensor and knee flexor average power at 6.28 radΧsec-1 in the athlete group following the vibration condition. There were no significant changes in any isokinetic measure for the non-athlete group. There were no significant changes in vertical jump or anaerobic power for either group. This may be due in part to the complexity of the dose-response relationship, which is largely dictated by the parameters of vibration frequency, amplitude, and duration. However, previous studies have found positive results using similar protocols as the present study. Practically speaking, the use of WBV prior to exercise may result in facilitated contractile and athletic performance. Consequently, this study sought to describe the impact of using WBV prior to exercise on muscle function.Key Words. Performance enhancement; Athletes; Power; Muscle Performance.Resumen. El objetivo de esta investigaciσn fue evaluar el efecto de la vibraciσn de cuerpo entero (WBV) sobre parαmetros de la funciσn contrαctil muscular. Ademαs, esta investigaciσn se realizσ para comparar los efectos de la WBV en atletas en comparaciσn con no atletas. Diecinueve hombres, estudiantes universitarios no deportistas, asν como 18 hombres, atletas de Divisiσn I universitaria participaron en esta investigaciσn. Todos los participantes completaron dos condiciones en orden aleatorio: la vibraciσn y la ausencia de vibraciσn. Los participantes fueron expuestos a 2 min de vibraciσn o una condiciσn de no vibraciσn por dos minutos. Inmediatamente despuιs de ambas condiciones, a los participantes se les midiσ la altura pico de salto vertical, el torque pico isocinιtico, la potencia media de extensores y flexores de la rodilla y la potencia anaerσbica durante una tarea de ciclo de esfuerzo mαximo 30 s. Los resultados muestran una mejorνa significativa en el torque pico de la rodilla a 6.28 rad·sec-1 en el grupo de deportistas luego de la condiciσn de vibraciσn. Los resultados tambiιn muestran una tendencia hacia un aumento significativo en la potencia promedio de los flexores y extensores de la rodilla a 6.28 rad·sec-1 en el grupo de deportistas luego de la condiciσn de vibraciσn. No hubo cambios significativos en las variables isocinιticas en el grupo de no atletas. Tampoco hubo cambios significativos en el salto vertical ni en la potencia anaerσbica en ambos grupos. Esto puede explicarse en parte a la complejidad de la relaciσn de dosis-respuesta, la cual estα ampliamente determinada por los parαmetros de frecuencia, amplitud y duraciσn de la vibraciσn. Sin embargo, estudios previos han encontrado resultados positivos utilizando protocolos similares a los del presente estudio. En tιrminos prαcticos, el uso de WBV antes del ejercicio puede resultar en una mejor contractilidad y rendimiento deportivo. En consecuencia, este estudio tratσ de describir el impacto del uso de WBV antes del ejercicio en la funciσn muscular.Palabras claves. mejora del rendimiento, atletas, potencia, rendimiento muscular

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Progression of Fatigue Under Whole Body Vibration Condition

10.4271/2005-08-0054 ◽

2005 ◽

Author(s):

Atsuki Sasaki ◽

Etsunori Fujita ◽

Takeshi Nishiura ◽

Kazuhiko Fujikawa

Keyword(s):

Whole Body Vibration ◽

Whole Body ◽

Body Vibration ◽

Vibration Condition

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Task-Related Hemodynamic Response Alterations During Slacklining: An fNIRS Study in Advanced Slackliners

Frontiers in Neuroergonomics ◽

10.3389/fnrgo.2021.644490 ◽

2021 ◽

Vol 2 ◽

Author(s):

Oliver Seidel-Marzi ◽

Susanne Hähner ◽

Patrick Ragert ◽

Daniel Carius

Keyword(s):

Motor Cortex ◽

Primary Motor Cortex ◽

Premotor Cortex ◽

Cortical Activity ◽

Hemodynamic Response ◽

Whole Body ◽

Functional Near Infrared Spectroscopy ◽

Body Balance ◽

Balance Task ◽

Brain Processing

The ability to maintain balance is based on various processes of motor control in complex neural networks of subcortical and cortical brain structures. However, knowledge on brain processing during the execution of whole-body balance tasks is still limited. In the present study, we investigated brain activity during slacklining, a task with a high demand on balance capabilities, which is frequently used as supplementary training in various sports disciplines as well as for lower extremity prevention and rehabilitation purposes in clinical settings. We assessed hemodynamic response alterations in sensorimotor brain areas using functional near-infrared spectroscopy (fNIRS) during standing (ST) and walking (WA) on a slackline in 16 advanced slackliners. We expected to observe task-related differences between both conditions as well as associations between cortical activity and slacklining experience. While our results revealed hemodynamic response alterations in sensorimotor brain regions such as primary motor cortex (M1), premotor cortex (PMC), and supplementary motor cortex (SMA) during both conditions, we did not observe differential effects between ST and WA nor associations between cortical activity and slacklining experience. In summary, these findings provide novel insights into brain processing during a whole-body balance task and its relation to balance expertise. As maintaining balance is considered an important prerequisite in daily life and crucial in the context of prevention and rehabilitation, future studies should extend these findings by quantifying brain processing during task execution on a whole-brain level.

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