Electromyographical manifestations of muscle fatigue during different levels of simulated light manual assembly work

The Influence of Fatigue on Muscle Temperature

“…The results indicate that low-level effort causes changes in blood pressure, heart rate and blood flow [27,28,29]. Moreover, studies with the use of surface EMG show fatigue at levels of muscle contraction as low as 8% MVC [26]. This suggests that especially low levels of load of the musculoskeletal system require further study.…”

“…However, other studies indicate musculoskeletal disorders in muscles (e.g., trapezius) loaded at a very low level with continuous work [24]. Studies also suggest that some phenomena, which lead to muscle myalgia, occur even at low levels of muscle contraction [25,26]. Invasive experiments, with biochemical indicators (CrP, ATP, ADP) show changes in time of load even at levels under 10% MVC [25].…”

Reliability and interpretation of single leg stance and maximum voluntary isometric contraction methods of electromyography normalization

“…Surface electromyography (EMG) is useful in the study of human movement as it is a non-invasive method used for evaluating the timing of muscle activation and activation amplitude during walking (Benoit et al, 2003;Santilli et al, 2005), running (Mann et al, 1986), and rehabilitation exercises (Arokoski et al, 2004;Sakamoto et al, 2009), and as a measure of skeletal muscle fatigue (Bosch et al, 2009;Ebaugh et al, 2006). Though the EMG signal can be easily obtained, there exist a multitude of threats that can potentially alter its amplitude and frequency characteristics (De Luca, 1997).…”

Influence of type of MVC test on electromyography measures of biceps brachii and triceps brachii

“…The lack of significant differences in maximum force and in both time and frequency domain EMG measures indicates reliability and lack of fatigue caused by exerting MVC [3,4]. The values of the amplitude and spectral measures for BB and TB were different in the three tests (when acting as agonistics, antagonistics or stabilizers).…”

“…Mostly because it is non-invasive, EMG with surface electrodes is increasingly significant in various applications. Measurements of the EMG signal and analyses of the differences in EMG measures are frequently used in analysing the level of muscle contraction [1,2] or fatigue [3,4]. EMG is also applied to investigate muscle activity during physical exercises [5] or to diagnose the relationship between muscle cramp and exercise-related pain [6].…”