Stimulation Intensity - Rehabmedic Pro Stim 2 Manual Del Usuario

Ca ions are freed by the reservoirs causing the approach of actin and myosin. The result is that the
distance between the bands Z diminishes causing therefore the muscular contraction.
The energy demanded for the contraction is supplied by the supply of sugars and fats stored in
the human body. In other words, the electrical stimulation is not a directed energy resource but
it works as an instrument that triggers the muscular contraction. The same type of mechanism is
activated when the muscular contraction is produced by the EMS.
They assume in other words the same role of a natural impulse transmitted by the motor nervous
system. Normally the muscle relaxes and returns to its original state them at the end of the con-
traction.
ISOTONIC AND ISOMETRIC CONTRACTIONS
The isotonic contraction reveals when, in a movement of our body, the interested muscles pro-
duce a state of constant tension. The isotonic contraction reveals when, in a movement of our
body, the interested muscles produce a state of constant tension. Instead, when the joint heads
of a physical segment are blocked and the musculature produces a tension, we talk about an
isometric contraction.
In the event of the electro stimulation an isometric contraction is preferred because it fosters to
obtain a more effective control.
THE DISTRIBUTION OF THE DIFFERENT TYPES OF FIBERS IN THE MUSCLE
The relationship between the two main categories (type I and the type II) can vary in sensitive
way. There are muscular groups that are typically constituted by fibers of type I, like the soleus,
and there are muscles that have only fibers of type II like the orbicular muscle. But in the most
part of the cases we have a simultaneous presence of various types of fibers.
The studies lead on the distribution of fibers in the muscle have put in evidence the strait rela-
tionship that exists between the motoneuron (tonic or phasic) and the functional features of fibers
from it innervate and have demonstrated as to a specific motor activity
(and sports in particular) can determine a functional adaptation of the fibers and a modification of
the metabolic features of the same ones.
Motor unit
Tonic
Phasic
Phasic
In order to make a tissue pass from the phase of rest to the one of excitation, by means of an
induced electrical stimulus (impulse of the electrostimulation), some conditions are necessary:
- the current amount.
- the duration of the stimulus that must be adapted to the corporeal district that is wanted to be
stimulated.
From this consideration, for the excitation of a tissue, the relationship between the duration and
the intensity of the stimulus is particularly important and not only the value of the peak of the
intensity. This relationship varies according to the muscular district.

STIMULATION INTENSITY

The current intensity necessary to obtain muscular contraction is personal and depends on the
position of the electrodes, the underlying adipose tissue layer, sweating, the presence of hair on
the area to be treated, etc. For these reasons, the same current intensity can generate different
feelings from person to person, from day to day, and from the right side to the left side of the
body. During different sessions, it will be necessary to regulate the intensity in order to obtain
the same level of contraction because of the accommodation phenomena. The current intensities
recommended in the different phases are proposed as indicative values, and each person should
Rev.4 22.06.2018
Concentration type
ST slow contraction
FTa fast contraction
FTb fast contraction
Fiber type stimulation frequencies
I a
II a
II b
10 - 50 Hz
50 - 70 Hz
80 - 120 Hz
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