The Use of Surface Electromyography in Biomechanics

TLDR

Surface electromyography in biomechanics is applied to assess muscle activation timing, the force–EMG relationship, and fatigue indices. The lecture aims to explore sEMG applications in biomechanics, pose guiding questions, identify key challenges, and advocate for standardized international procedures. The authors review technical factors that maximize EMG recording fidelity and compile all known influences on EMG signal quality. Sixteen recommendations are provided for proper detection, analysis, and interpretation of EMG signals and associated force measurements.

Abstract

This lecture explores the various uses of surface electromyography in the field of biomechanics. Three groups of applications are considered: those involving the activation timing of muscles, the force/EMG signal relationship, and the use of the EMG signal as a fatigue index. Technical considerations for recording the EMG signal with maximal fidelity are reviewed, and a compendium of all known factors that affect the information contained in the EMG signal is presented. Questions are posed to guide the practitioner in the proper use of surface electromyography. Sixteen recommendations are made regarding the proper detection, analysis, and interpretation of the EMG signal and measured force. Sixteen outstanding problems that present the greatest challenges to the advancement of surface electromyography are put forward for consideration. Finally, a plea is made for arriving at an international agreement on procedures commonly used in electromyography and biomechanics.