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START UP MANUAL
IMPGA 3000
Longitudinal plate location is useful where the motor point of a muscle is not
easy to locate. One plate is placed near its origin and the other near the
insertion of the same muscle. The current has to pass the motor point.
On the face, where a number of motor-points are close together, conventional
plate application is not possible, or at least, difficult.
Duration of the movement pulse
Normally, every brief and intense passive exercise pulse lasts 0,3 milliseconds
(about 3/10.000 of a second). Some machines have a control system for the
duration or amplitude of the movement allowing maximum control of the
electrical pulse.
Pulse duration or
“amplitude”
MOVEMENT DURATION OR AMPLITUDE
IN MOVEMENT PULSES
Frequency of movement pulses
Many appliances include a button allowing to control the frequency included
between 40 and 120 approximately.
Alternatively, there is also a mild/intensive switch. Controlling this buttons and
switches, different sensations can be produced in the client. The numbers
correspond to the frequency of pulses per second.
A pulse frequency of 40-60 pulses per second produces a vibratory
contraction of the muscle. This is known as incomplete tetany in the
muscle or vibratory effect. The muscle vibrates because it has time to relax
a little before the next contraction.
Turning up the frequency to around 90 pulses per second produces a steady
contraction, a complete tetany or a smooth effect. The muscle does not
have time to relax between one pulse and the next.
around 50 movements per
second (vibration effect)
EMA
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