Acute whole-body vibration increases reciprocal inhibition

作者：Ritzmann Ramona; Krause Anne^*; Freyler Kathrin; Gollhofer Albert

来源：Human Movement Science, 2018, 60: 191-201.

DOI：10.1016/j.humov.2018.06.011

• Electromyography
• Spinal excitability
• Co-contraction
• Conditioned H-reflex
• Antagonist
• Peripheral nerve stimulation

Based on previous evidence that whole-body vibration (WBV) affects pathways involved in disynaptic reciprocal inhibition (DRI), the present hypothesis-driven experiment aimed to assess the acute effects of WBV on DRI and co-contraction. DRI from ankle dorsiflexors to plantar flexors was investigated during submaximal dorsiflexion before and after 1 min of WBV. With electromyography, musculus soleus (SOL) H-reflex depression following a conditioning stimulation of the peroneal nerve (1.1x motor threshold for the musculus tibialis anterior, TA) was assessed and co-contraction was calculated. After WBV, DRI was significantly increased (+4%, p < 0.05). SOL (-13%, p < 0.05) and TA ( - 6%, p < 0.05) activities were significantly reduced; cocontraction tended to be diminished ( - 8%, p = 0.05). Dorsiflexion torque remained unchanged. After WBV, DRI increased during submaximal isometric contraction in healthy subjects. The simultaneous SOL relaxation and TA contraction indicate that a more economic movement execution is of functional significance for WBV application in clinical and athletic treatment.

• 出版日期2018-8