Exercise with vibration dumb-bell enhances neuromuscular excitability measured using TMS

Area of Science:

• Neuroscience
• Exercise Physiology

Background:

• Transcranial magnetic stimulation (TMS) is a non-invasive technique used to assess corticospinal excitability.
• The cortical silent period (CSP) and cortical motor threshold (CMT) are key TMS-derived measures of motor cortex inhibition and excitability, respectively.
• The influence of vibration exercise on these neurophysiological parameters remains an area of active investigation.

Purpose of the Study:

• To investigate the effects of exercise with and without vibration on the CSP and CMT.
• To determine if vibration exercise alters neurophysiological measures of corticospinal excitability.

Main Methods:

• Twenty-two university athletes participated in the study.
• Participants performed biceps curls with a vibration dumbbell (27 Hz) and without vibration.
• Cortical silent periods and cortical motor thresholds were measured using TMS before and after exercise protocols.

Main Results:

• Exercise without vibration increased the CSP in the dominant (exercised) limb.
• Exercise with vibration significantly decreased the CSP in both dominant and non-dominant limbs.
• Vibration exercise led to a significant decrease in CMT in both exercised and non-exercised limbs.

Conclusions:

• Vibration exercise enhances bilateral corticospinal excitability.
• This enhancement is evidenced by a shortened CSP and a reduced CMT.
• Vibration exercise demonstrates a systemic effect on motor control pathways.