Abstract Summary
Surface EMGs were recorded from two muscles of the dominant lower leg during vibratory stimulation at different frequencies, while participants kept two postures on a vibrating platform. Ten vibratory sessions, combining various frequencies and postures were administered in a randomised order. RMS values analysis revealed a marked increase of muscles activation at higher frequencies and specific posture. This study confirms the muscle tuning hypothesis during muscle oscillation and suggests that their muscular activation can be linked to the mechanical resonance of the involved soft tissues. The results may have important implications for studies investigating strategies to improve postural control, tuning calf muscle activation via a combination of frequency and posture. Further studies are ongoing including the analysis of accelerations of the soft tissue in the vicinity of EMG electrodes to identify the most efficient whole body vibration stimulation to target specific muscles.
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