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Tetanic contraction/muscle twitch

When a muscle fiber is innervated by a motor neuron, its mechanical response is 

very brief, and always identical. It shortens and then returns to its original length. 

This is what is known as a muscle twitch. Twitches occur separately at frequencies 

of under 10 Hz, i.e., there is no real contraction of the muscle. At frequencies of over 

10 Hz, however, the twitches act as one and cause the muscle to contract. 

Pulse duration

The interval between onset of the leading edge and the end of the trailing edge 

of a pulse wave, that is, the time the muscle stimulator is energized during each 

cycle. Generally expressed in microseconds (us). In order to minimise the amount of 

electrical energy required, the pulse duration should be the same as the excitability 

coefficient (chronaxy) of the motor neuron that is responsible for innervating the 

target muscle.

Pulse frequency

The number of times a pulse is repeated per second is the pulse frequency. It is 

expressed in hertz (Hz). A frequency of 10 Hz means that the pulse is repeated 10 

times every second and that, accordingly, the muscle fibers twitch 10 times every 

second. Likewise, a frequency of 25 Hz means that the pulse is repeated 25 times 

every second, and that the muscle fibers twitch 25 times every second. When so 

many twitches occur in such a short space of time, however, it is not possible to 

distinguish them as individual twitches. This phenomenon is known as temporal 

summation. Instead of a series of individual, consecutive twitches, what occurs is

a fusion of twitches, or a true tetanic contraction (this process is also known as 

tetanisation). The greater the fusion, the greater the contraction force, and the 

greater the work per unit of time.

Rest time

The length of time between contractions is the rest time.

Ramp up

The time it takes for the intensity/energy level to go from 0 to the programed value 

is the ramp up. The exercise programs have a ramp up time of 2 seconds at the 

beginning of the contraction phase.

Ramp down

The time it takes for the intensity/energy level to go from the programed value to 0. 

The ramp down is one second after the contraction phase.

Intensity

The determining factor in electrical stimulation is the magnitude of electrical 

charge (microcoulombs) applied. In the case of rectangular pulses, the magnitude 

of charge is calculated by multiplying the duration of the pulse by the intensity of 

the current. When stimulation is performed using a known pulse duration, the  

intensity (expressed in milliamperes or mA) is a reproducible indicator of the 

degree of stimulation.

definition of terms

29

Feature

Contour

®

 EMS

Other EMS

Contour

®

 Advantage

Power Signal

Voltage Regulated

Current 

Regulated

Provides safer, stronger more

comfortable user experience

Electrode Size

2.75" x 5" 

2" x 4"

2" x 4"
2" x 2"

larger electrodes = more muscle 

fibers activated and more comfort

Backlit  screen

Backlit screen stays lit 

at 100% while you are 

setting-up your session

NO

Easy-to-read and program in any 

light conditions

diet Guide

Contour Diet Guide

contains a 1,400 and a 

1,800 calorie a day plan

NO

Maximize your results by 

following this balanced

eating plan

Exercise 
Program

Contour includes a

12 Week Total Body 

Dumbbell Program

NO

Maximize your results with this 

total body exercise guide

Pulse 
Frequency

1-120 Hz

50-70 Hz

Work a large variety of

muscle fibers

Pulse Duration

200 or 500 (us)

200 or 300 (us)

Larger pulse duration for more

effective muscle contractions 

User 
Information

• Maximum Intensity
• Average Intensity
• Total Sessions,
• Total Minutes

Some capture 

last session,

others don’t track 

any info.

Contour keeps a running training 

journal to help you stay

motivated and track progress

last Session

Repeat your last session

Some do/ some 

don’t

Skip the set-up menus -

get right to the workout

Mounting Clip

The Contour Electronic 

Muscle Stimulator can 

attach to belts

lanyards or armbands

NO

Secure your Contour muscle

stimulator for a hands-free workout

the contour difference

Contour electronic muscle stimulators actually mimics the brains natural 

electrical signal at the muscle. This gives you better muscle activation with 

a comfortable user experience. With Contour, the human body takes exactly 

the amount of electrical current it needs to contract the muscles and then it 

naturally increases its impedance to reduce the current. Other stimulators 

force a large amount of current into the body (That creates the discomfort or 

burning feeling users can experience with a current regulated devices.) Simply 

put, Contour electronic muscle stimulators have more power, giving you more 

comfortable contractions and producing better results. 

Содержание CoreBelt

Страница 1: ......

Страница 2: ..._____________10 Intensity The Key to an Effective Workout__________________12 Getting Started With Total Body Exercise___________________14 Training Programs____________________________________16 Scheduling Contour Training Sessions_____________________18 Work Table__________________________________________20 Frequency Table______________________________________21 Frequently Asked Questions_______...

Страница 3: ... and caution with electrodes sections in this manual The various types of muscle work that the Contour CoreBeltimposes on the stimulated muscles are able to improve or facilitate muscle performance in addition to firming tightening and strengthening muscles The Contour CoreBelt can therefore be considered a technique for muscle training How it works The Contour Technology Ab Belt features four spe...

Страница 4: ... increase and decrease intensity Sound Mute Select Information i LCD Display On Off Pause 4 The M2 Electronic Muscular Stimulator The Contour M2 Electronic Muscular Stimulator with technology that mimics the way your brain controls muscles The M2 Electronic Muscle Stimulator display 5 ...

Страница 5: ...the top edge of the belt Repeat steps 5 and 6 for placing remaining Gel Pads along the back of the CoreBelt 7 This side to garment T belt loop left side of the CoreBelt 7 ABS ABS This side to garment T belt loop left side of the CoreBelt 8 ABS ABS This side to garment T belt loop left side of the CoreBelt 9 Slide the two Gel Pad connector wires through the hole on the left side of the CoreBelt Rep...

Страница 6: ...ply push the Select button to advance to the next screen Turn up the intensity 6 TURN ON THE Contour M2 device 1 Push the On Off button A logo screen will appear followed by a warning screen We recommend you read the warning screen and refer to the warning chapter in this manual if you have any concerns Select Recent Program 2 After a few seconds the screen will ask you would you like to use the m...

Страница 7: ...nd you should increase the intensity to achieve the best results Good Better Best Intensity Levels Pressing the On Off Button during the exercise phase will pause the program To continue simply press the toggles Pressing the On Off Button a second time will take you back to the setting screen Pressing the On Off Button a third time will shut the device off QUICK TIP End of session At the end of yo...

Страница 8: ...xplosive Strength and Endurance training programs A The highest level possible but bearable in order to recruit the largest possible numbers of muscle fibers The contractions must be powerful without ever becoming uncomfortable Q What intensity should be reached for the special programs Potentiation and Active Recovery A These programs do not require the use of maximum current levels However the i...

Страница 9: ...ke you beyond what regular exercises can do 15 POTENTIATION PROGRAM Warm up your muscles quickly and prepare them to work faster and easier at the beginning of training or physical activity WARM UP BETTER ENDURANCE PROGRAM Delay muscle fatigue during activity Muscles perform more work with less oxygen Improves overall endurance RESISTANCE PROGRAM Increase strength of slow twitch muscles Improves p...

Страница 10: ... aerobic type of metabolism in muscle fibers and increases their capillary blood supply It trains the muscles to maintain effort for longer periods as it is required in endurance sports like marathons long distance bicycling etc Impulse sequences in this program are designed to improve the body s resistance to fatigue improved endurance The program targets very slow twitch muscle fibers Active Rec...

Страница 11: ...tioning Setting the appropriate intensity level See Intensity The Key to an Effective Workout on page 12 and the Contour Intensity Scale on page 13 19 Progression through the levels In general we don t recommend that you go through the different program levels quickly with the intention of getting to level 5 as soon as you can The levels represent progress in training and you should provide time f...

Страница 12: ...in Explosive Strength 5 120 Hz 3 sec 34 sec 4 Hz 20 min 35 min There is a ramp up of 2 seconds prior to the contraction time and a ramp down of one second after the contraction The average rest frequency is 4Hz Hz of stimulations per second e g 1 Hz 1 stimulation second 50 Hz 50 stimulations second 21 Phase Effect on Muscles Frequency Active Recovery Spasm Reduction Relaxation 1 3 Hz Endorphin Rel...

Страница 13: ...l pads won t stick to the belt even though they are relatively new A Make sure you remove the protective cover entirely before mounting the gel pad on the Contour Ab Belt Make sure that you are placing the silver side of gel pad electrodes to the BACK SIDE of the Ab Belt There will be outlines showing where to place the gel pad electrodes Once the gel pads have been applied to the Ab Belt leave th...

Страница 14: ...feel tingling in my legs during a session What can I do A The Contour electronic muscle stimulator emits an electrical frequency that will stimulate nerves motor neurons that are located beneath the gel pads Since the gel pads are larger it is possible to have some minor stimulation of other nerves located near the site of the gel pads Re adjust the gel pads slightly away from the area being unint...

Страница 15: ...l pad electrode is making good contact wIth your clean dry skin The battery symbol is flashing The batteries are low Replace all 4 AAA batteries Never mix old and new batteries The contractions are weak even though the intensity is high The batteries are low Replace all 4 AAA batteries Never mix old and new batteries The Gel Pads have lost conductivity Replace Gel Pads The pads are positioned impr...

Страница 16: ...he magnitude of electrical charge microcoulombs applied In the case of rectangular pulses the magnitude of charge is calculated by multiplying the duration of the pulse by the intensity of the current When stimulation is performed using a known pulse duration the intensity expressed in milliamperes or mA is a reproducible indicator of the degree of stimulation Definition of terms 29 Feature Contou...

Страница 17: ...50Hz 50Hz 50Hz DC Component Approx 32 µC 16 µC 11 µC Positive Pulse Width 300 µs 300 µs 300 µs 31 Care and cleaning To clean the Contour M2 device use a soft cloth lightly dampened with an alcohol based cleaning product that does not contain solvents Solvents could damage the plastic parts especially the display Your Contour M2 device is designed to be maintenance free There are no user serviceabl...

Страница 18: ...61000 4 6 3 V rms 150 kHz to 80 MHz outside ISM bands 3 V rms Radiated RF IEC 61000 4 3 3 V m 80 MHz to 2 5 GHz 3 V m 80 MHz to 800 MHz 800 MHz to 2 5 GHz 33 Where P is the maximum output power rating in the transmitter in watts W according to the transmitter manufacturer and d is the recommended separation distance in meters m Field strengths from fixed RF transmitters as determined by an electro...

Страница 19: ...s which may not operate properly when the electrical stimulation device is in use Operation in close proximity e g 1 yard to shortwave or microwave therapy EQUIPMENT may produce instability in the STIMULATOR output Applications with electrodes near the rib cage may produce heart ventricle fibrillation Application of electrodes near the thorax may increase the risk of cardiac fibrillation And injur...

Страница 20: ...or with OXYGEN OR NITROUS OXIDE Environmental conditions for transport and storage specified in accompanying documents and marked on packaging min temp and humidity Do not stand while you are stimulating the lower body as it may cause you to fall 37 POTENTIAL ADVERSE REACTIONS Skin irritation and burns beneath the electrodes have been reported with the use of powered muscle stimulators In order to...

Страница 21: ...ctrode set as skin reaction or cross contamination may occur Do not immerse the electrodes into water Do not apply a solvent of any kind onto the electrodes Always stop the Contour Technology Muscle Stimulator before removing or moving the electrodes Wash skin and dry skin thoroughly before applying the electrodes Apply the whole surface of the electrodes firmly to the skin Do not use electrodes t...

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