The MPF evolution (Figure 2, Table 4) shows a sustaining
fatigue for the Trapezius muscles left and right (mainlyRS) < 0.01), a moderate fatigue in SS and a low in CS and correspond with the MVC Trapezius muscles losses. There
is an opposite fatigue in the Flexor muscles for SS and RS,
left negative, right positive for SS and inversed for RS. The
compensation effect could be attributed to an influence
of the individuals’ right or left hand preferences .