Manifestation of fatigue in myoelectric signals of dynamic contractions produced during playing PC games

This paper investigates manifestation of fatigue in myoelectric signals during dynamic contractions produced whilst playing PC games. The hand´s myoelectric signals were collected in 26 independent sessions with 10 subjects. Two methods, spectral analysis and time-scale analysis, were applied to compute signal frequency and least-square linear regression was used to model the trend of frequency shift. Non-parametric statistical methods were employed to analyze experimental results, which indicates significant decline in signal frequency as a manifestation of fatigue in long-term muscle activities.