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Glossary
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KOTZ CURRENTS (Electrotherapy)
New scientific discoveries on muscle contraction mechanism as well as a new technology that can generate pulses of different shape (square, triangular, trapezoidal, etc.) led to the gradual abandonment of the sinusoidal current for the electric stimulation of muscles for sports training in favor of the higher-performing current with square biphasic symmetric waves with frequencies ranging from 30 to 120 Hz.The Kotz current, nonetheless, continued to be used in the medical field, where it still has valid applications for its characteristics:
1) Good muscle recruitment
2) Deep action
The motor exciting effect of the Kotz current, unlike other types of current, takes place deep within the muscle, because the skin gives less resistance to this currents. Indeed, it has been proved that the skin's electrical impedance diminishes as the frequency increases.
