The objective strain criteria (MVC) in the shoulders and
arm-systems, represented in Figure 1 and (Table 3) show
changes in the MVC before-after tests that are opposite to
the VAS (lower subjective problems for more loss in power).
The MVC for the Trapezius muscle calls upon almost all MU’s
in a full isometric contraction, by which the muscle fibers
are exhausted within 2 s. The sudden acidosis could not be
fully dissolved before starting the therapy and the residue
(sustaining fatigue) will affect the evolution in the post MVC
test. The MVC as an assessment factor can be questioned
for the assessment of massage-efficiency because MVC
could be affected by other factors than the ‘massagerelated’
method, such as some private inter- and intraindividual
differences e.g., the left- or right-hand
preferences.