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The Effect Of Transcutaneous Auricular Vagus Nerve Stimulation On Sports Performance And Physiological Parameters In Healthy Young Individuals: Randomized, Double-Blind Study
In Brief
A clinical study evaluating Auricular Vagus Nerve Stimulation Level Of Above Threshold, Auricular Vagus Nerve Stimulation Level Of Subthreshold, and 2 other interventions for Healthy and Activity, Motor. Completed, enrolled 46 participants across 1 site.
Detailed Summary
OBJECTIVE: The aim of this study is to investigate the effect of non-invasive auricular VNS (Vagus Nerve Stimulation) on sportive performance and physiological parameters in healthy individuals. MATERIAL AND METHOD: 46 healthy young individuals aged 19.2(±1.5) years participated in the study. The participants were randomly divided into 3 groups as Above Threshold Group (n:15; 10 females, 5 males), Under Threshold Group (n:15; 10 females, 5 males) and Control Group (no stimulation) (n:16; 11 females, 5 males) according to the sensation of electrical current on ears. The participants were evaluated 3 times; before the application, after the first and second bicycle exercises. Numerical pain scale (NPS), pulse rate, blood pressure, respiratory rate, and distance travelled during exercise for sportive performance were recorded in kilometers as the evaluation method. The stimulation was done during the first bicycle exercise with 5 minutes of duration. The Kruskal-wallis, mann-whitney u test were used for the quantitative independent data obtained. In the analysis of qualitative independent data, chi-squared test was used.
Study Details
Timeline
Interventions
Biphasic current was applied as follows; frequency 10 Hz, in Modulation mode (Modulation mode is a combination of pulse rate and pulse width modulation. The pulse rate and width are automatically varied in a cycle pattern. The pulse width is reduced by 50% from its original setting in 0.5 second, then the pulse rate is reduced by 50% from its original setting in 0.5 second. Total cycle time is 1 second.), the pulse width was 300 μs. The current intensity was kept constant where the participant felt the current comfortably and applied for 5 minutes.
biphasic current was applied as follows; frequency 10 Hz, in Modulation mode (Modulation mode is a combination of pulse rate and pulse width modulation. The pulse rate and width are automatically varied in a cycle pattern. The pulse width is reduced by 50% from its original setting in 0.5 second, then the pulse rate is reduced by 50% from its original setting in 0.5 second. Total cycle time is 1 second.), the pulse width was 300 μs. The parameters were the same with Above Threshold Group but the current was reduced to where the participant did not feel the current after the threshold value was reached and again applied for 5 minutes.
Participants were shown that the device was working, but no current was given.
Participants in this group were asked to perform bicycle exercise with maximum performance under 50 watts for 5 minutes.