BioMed® Fit – Russian/Interferential Unit

The BioMed® Fit is a TRUE Russian Stimulator and Interferential handheld device. Russian Therapy was originally developed in 1971 by the Russian Olympic team for strength and muscle mass enhancement but is now mostly used for muscle strengthening in the United States. Russian stimulation is not the same as an EMS (Electrical Muscle Stimulation) unit. A Russian stimulator allows for a deeper muscle penetration and a stronger more complete contraction of the muscle fibers unlike an EMS device. Generally speaking Russian stimulation is intended for athletic training.

This is the ONLY handheld device programmed with the Russian 10-50-10 protocol providing an experience only found in clinical models. Other handheld Russian devices DO NOT HAVE PROTOCOLS!!

A TRUE Russian Stimulator has BOTH the 10-50-10 protocol regimen and a carrier frequency of 2500Hz. If a device does not have both, it’s not a TRUE Russian Stimulator. This is the real deal!


The BioMed® Fit also incorporates Interferential therapy for pain and edema reduction. This device comes with everything needed to manage your therapy session

1 Year Limited Warranty

Usable HCPCS codes # E0745 and/or E1399               Item Number # KBMF

BioMedical Life Systems, Inc. distributes their products through various Dealers, Distributors, and Healthcare Organizations.

General Specs

General Specs

Channels: Dual
Electrodes: 4
Waveform: Symmetrical Square pulse train
Amplitude: Adjustable from 0-70 mA peak
Carrier Frequency: 2500 Hz or 4000 Hz
Russian: • 11 total cycles

• 10-50-10 programed protocol

• Symmetrical Square pulse train

• Pulse Rate = 2500 Hz

• Pulse Width = 250 μS

• Pulse Train 50% duty cycle at 50 Hz

Interferential: • Symmetrical Square pulse train

• Pulse Rate CH1 = 4000 Hz fixed

• Pulse Rate CH2 = 4001 – 4150 Hz adjustable

• Pulse Width = 125 μS fixed per phase

• Timer fixed at 15 min.

Power Supply: 9V Battery or A/C wall adaptor
Size: 4.5” L x 2.55” W x 0.9” H
Weight: 4.48 Oz. (with battery)
Tolerances: +/- 10%
Resistance Load: Data recorded across a 1000 OHM resistance load
1.1 MiB
What is a 10-50-10 Russian protocol?

What is a 10-50-10 Russian protocol?

Simply put it means:

  • 10 seconds of stimulation (muscle contraction) per cycle
  • 50 seconds rest period per cycle
  • Repeating this cycle 10 times
  • After the final cycle, the device beeps and shuts off


There are a total of 11 cycles (1st cycle is an Amplitude adjustment period)

  • Amplitude keys will not respond when cycle starts
  • Ramp ON = 1 sec
  • Ramp OFF = 1 sec
  • ON TIME = 10 seconds
  • OFF TIME = 48 seconds (count down is viewed on LCD screen).
  • Total time elapsed is 10 minutes

Our Russian specifications in General Specs indicate the term “Pulse Train 50% duty cycle at 50 Hz”. It’s a very technical term but this refers to the amount of bursts per second. There are 50 bursts per second and each burst has a carrier frequency of 2500 Hz.

Why is Russian Therapy used?

Why is Russian Therapy used?

Generally speaking Russian electrical stimulation intended for athletic training. Russian stimulation uses high frequency sinusoidal waveforms, whereas EMS (Electrical Muscle Stimulation) /NMES (NeuroMuscular Electrical Stimulation) typically uses lower frequency rectangular waveforms.

Russian stimulation is intended for strengthening muscles, increasing muscle size, improving muscular endurance, and accelerating muscle recovery. Although EMS/NMES also aids in strengthening muscles, the intensity of a Russian stimulator can be overwhelming and should never be used for individuals with muscle atrophy.

EMS/NMES is intended for relaxing muscle spasms, preventing muscle atrophy, increasing blood circulation, maintaining or increasing range of motion, and especially for re-educating the neuromuscular system.




Muscle Strengthening

Increase Muscle Size

Improve Muscular Endurance

Accelerating Muscle Recovery

Relax Muscle Spasms

Prevent Muscle Atrophy

Increase Blood Circulation

Increase Range of Motion

Muscle Re-Education


Interferential Therapy

Interferential Therapy

Interferential (IF) Therapy works by sending small electrical impulses through the skin. Interferential stimulation is characterized by two alternating current sine waves of differing frequencies that work together to produce an interferential current that is also known as a “Beat Frequency”. One of the two currents is usually held at 4000 Hz and the other can be held constant or varied over a range of 4001 to 4150 Hz. Because of the frequency, the interferential wave meets low impedance when crossing the skin to enter deep into soft tissues. The interferential currents can stimulate sensory, motor and pain fibers. These large impulse fibers interfere with the transmission of the pain messages at the spinal cord level. This deep tissue penetration stimulates parasympathetic nerve fibers for increased blood flow and edema reduction. It utilizes the low electric current to stimulate muscle nerves to achieve the symptomatic relief of chronic intractable pain, post traumatic pain and post-surgical pain. In turn, reducing or eliminating the need for most pain-related drugs.

Mode CH1 CH2



P1 Edema

Fixed at 4000Hz

Starts at 4001Hz increases to 4010Hz each cycle time then decreases to 4001Hz the next cycle time

Every 16 sec.


Pain & Edema

Fixed at 4000Hz

Starts at 4001Hz increases to 4150Hz each cycle time then decreases to 4001Hz the next cycle time

Every 20 sec.



Fixed at 4000Hz

Starts at 4080Hz increases to 4150Hz each cycle time then decreases to 4080Hz the next cycle time

Every 20 sec.



  • BioMed® Fit device
  • (4) 1.5″ x 2.5″ oval electrodes
  • Standard industry lead wires
  • (1) 9V battery
  • A/C wall adaptor
  • Zippered pouch
  • Belt clip
  • Instruction manual