Neuromuscular Fatigue Characteristics in Female Painters Following the Working Day
¹ Institute of Exercise Biology and Physiotherapy, University of Tartu
5 Jakobi Str., EE51014 Tartu, Estonia; e-mail: firstname.lastname@example.org
² Institute of Technology, Estonian University of Life Sciences
56 Kreutzwaldi Str., EE51014 Tartu, Estonia; e-mail: email@example.com
The aim of this study was to evaluate changes in neuromuscular fatigue characteristics in painters following the working day. The subjects (n = 10) were female painters aged 22-60 years. First the subjects completed a questionnaire and thereafter they performed before and after the working day a 3-minute test of wall painting, in the course of which the electromyographical (EMG) power spectral median frequency (MF) for biceps brachii, trapezius, deltoideus and infraspinatus muscles was measured. The results indicated an increase in subjectively evaluated muscle fatigue compared to the beginning of the working day, whereas the most burdened regions were the arms and shoulders. Objectively estimated muscle fatigue emerged before and after the working day when comparing EMG power spectral MF measured at the beginning and end of the wall painting test. However, this muscle fatigue, evaluated objectively by EMG power spectrum MF slope from biceps brachii, trapezius, deltoideus and infraspinatus muscles, did not differ significantly before and after the working day. This study revealed that painters used different manners of work, whereas the working tool was the same for everyone and no-one had customized it for herself. It is also important to emphasize that 82% of the workers had not been guided in terms of ergonomics. The results of this study can be used by specialists of ergonomics.
Electromyography, muscle fatigue, neuromuscular function