The aim of the study was to determine the activity zones and the level of load on the driver's upper limb muscles while driving a vehicle with the use of adaptive devices, based on experimental studies using electromyography. The tests were carried out under dynamic conditions, during actual driving in controlled conditions. For the purposes of the experiment, a research procedure was developed involving the implementation of a defined sequence of vehicle manoeuvres. The measurements were made using surface electrodes placed on the skin in the area of the examined muscles. Changes in the amplitude of the EMG signal recorded in mV units were analysed. The results obtained made it possible to identify characteristic patterns of muscle activity and differences in the level of muscle load during the operation of individual adaptive devices. The research confirms the usefulness of EMG in assessing the muscle load of drivers and may form the basis for further ergonomic analyses in the field of adaptive vehicle control systems.