Reliability of electromyographic and torque measures during isometric axial rotation exertions of the trunk.
Joseph K-F Ng, Mohamad Parnianpour, Vaughan Kippers, Carolyn A Richardson
Clin Neurophysiol | Published : 2003
OBJECTIVE: The aim of the present study was to investigate the between-days reliability of electromyographic (EMG) measurement of 6 bilateral trunk muscles and also the torque output in 3 planes during isometric right and left axial rotation at different exertion levels. METHODS: Ten healthy subjects performed isometric right and left axial rotation at 100, 70, 50 and 30% maximum voluntary contractions in two testing sessions at least 7 days apart. EMG amplitude and frequency analyses of the recorded surface EMG signals were performed for rectus abdominis, external oblique, internal oblique, latissimus dorsi, iliocostalis lumborum and multifidus bilaterally. The primary torque in the transve..View full abstract