The paper deals with the use of biomechanical systems for evaluation of muscular load of upper limbs. 

The study is focused on comparing EMG Holter with the EMG Biometrics DataLog. 

EMG Holter is the only approved device in the Czech Republic. 

The aim of the study was to compare the results of these two devices for sensing electrical potential in the muscles of the forearm of the upper limbs in the most commonly used positions of grip and compression of the object.

Keywords: EMG; local muscular load, Holter, Biometrics DataLog