Understanding The Science

YoniFlex EMS Pelvic Floor Trainer:

EMS pelvic floor science

I'll be honest with you, science class was not my favorite subject.  I preferred the arts to the sciences.   Nevertheless, for many of you considering something like my YoniFlex Pelvic Floor Trainer you will want to know in detail how technically the device works.  I'll do my best to break everything down below (yes, pun intended):


In this article I will break down:

  1. Scientific Evidence & peer reviewed clinical studies supporting the use of my YoniFlex device to improve the strength of your Pelvic Floor
  2. Scientific evidence showing improved pelvic floor strength leads to:
    1. Reduction of incontinence
    2. Improved Sexual Function
    3. Reduction of organ prolapse
    4. Improved overall sensations
  • 3. Explanation of what an EMS (Electrical Muscle Stimulation) device is - down to the nitty gritty details



Are you ready?  Do you have your thinking caps on?  Have you had your cup of morning coffee?  Ok - let's begin!


Part 1:  Scientific Evidence supporting the use of my Yoniflex EMS Pelvic Floor Trainer to improve the strength of your pelvic floor:

Electrical Muscle Stimulation is a technique that gently stimulates your muscles using a controlled electrical current.   Electrical Muscle stimulation - shortened to E.M.S. delivers small low-voltage electrical impulses to your muscles via a specialized probe, or in some cases electrodes.  These impulses cause your muscles to contract (tighten).  The muscle contraction and relaxation has two distinct purposes.  The first is to reduce inflammation (and therefore reduce pain) and the second is to strengthen and tone the pelvic floor muscles without involving the nervous system.  Working out the muscle without using your own nervous system avoids the fatigue and discomfort of 'manually' performing the exercise -which requires mental strength and concentration.

The process of stimulating your muscles into contractions is identical to the manual process known as 'doing a kegel' or 'excising your pelvic floor' in that the internal pelvic floor muscles are being tightened (contracted) and released (relaxed).  The difference is - with YoniFlex, this process happens automatically, dozens of times a minute!   This way, you don't even have to think about it - it just happens on its own as you go about your life.

Don't be confused - The YoniFlex EMS machine is vastly different from other 'electrode massagers' on the marketplace - such as "Dr. Ho" - as they use what is called "T.E.N.S." (Trans-cutaneous electrical nerve stimulation) which is designed specifically to reduce nerve, muscle, and joint pain, as well as migraine pain.  T.E.N.S technology is not designed to work muscles and promote strengthening of the muscles in your body like the YoniFlex is..

There have been an number of studies and research done on Electrical Muscle Stimulation across the world for many years.  Here are just a handful of examples scientifically proving the effectiveness of EMS to the body:

 From Science Direct:  "Electrical Muscle Stimulation" (EMS) - has been shown to increase muscle strength and mass...  Low-frequency stimulation appears to have greater effects on strengthening, while high frequency favors an increase in muscle mass...  EMS also promotes compositional changes of the muscle fibers and improvements in the oxidative enzymatic activity and glucose uptake." -Source

Excerpt from the book "Clinical Sports Medicine" by Joel M. Press & Deborah A. Bergfeld:  "Electrical Muscle stimulation may help prevent strength loss as well as prevent muscular atrophy...  Eriksson and Haggmark showed better muscle function in a group of patients... when treated with electrical muscle stimulation and isometric exercises then with isometric exercise alone.  In a study of rats and prevention of atrophy after 1 week of disuse found that electrical stimulation was effective in preventing deterioration of maximum tension and oxidative capacity.  - Source

Excerpt from Silvia Lieber on a study comparing manual muscle contraction with EMS for patients after surgery states:  "Electrical Stimulation and voluntary muscle contraction treatments, when performed at the same intensity, are equally effective in strengthening skeletal muscle that has been weakened." - Source


Part 2:  Strong Pelvic Floor = Better Health

A weak pelvic floor can lead to a host of health concerns.  While these health issues are necessarily the result of a weakened pelvic floor, it is by far the most common reason, and the most suggested at home method that personal health professionals, doctors, physiotherapists, and specialists recommend to people who experience these symptoms.  

Here are a list of weakened Pelvic Floor Symptoms (from Victoria's public health website) - Source

  • Leaking Urine when coughing, sneezing, laughing, or running.  This is called 'Stress Incontinence'.
  • Failing to reach the toilet in time (a.k.a. sudden and urgent need to urinate) - this is called "Overactive Bladder"
  • Leaking small amounts of urine through the day.  This is called 'Urge Incontinence'
  • Passing wind from the anus of vagina when bending over or lifting
  • Reduced Sensation in the vagina
  • Tampons that dislodge or fall out
  • A distinct bulge in the vaginal opening
  • A sensation of heaviness in the vagina

In addition to the above mentioned symptoms, other symptoms - according to Healthline - can include: - Source

  • Constipation or bowel strains
  • Lower back pain
  • Discomfort during sex
  • Pressure in the pelvic region or rectum
  • Muscle spasms in the pelvis.

So there you have it folks - In part one of this article we showed that using EMS stimulation can help to grow and strengthen your pelvic floor muscles.  Using the Yoniflex with EMS technology targets your pelvic floor muscles to help them strengthen and grow.  Now in part two, I've shown that weakened pelvic floor muscles can cause a host of issues and challenges.


Now to the third and final part...


Part 3:  The Science of EMS (electric Muscle Stimulation)

Now that we have shown you how effective EMS technology is to stimulating your muscles to strengthen, and shown you the negative effects of having weak pelvic floor muscles, its time to dive into the science of how the YoniFlex uses EMS to improve your muscle tone of your pelvic floor.

The YoniFlex uses electrical pulses directly on your body to cause your pelvic floors to activate (contract).  While it may seem strange to use electricity on your body, your body already uses electrical messages to tell your muscles what to do, so EMS is essentially 'taking out the middle man' in this situation.  Instead of your brain telling your body to 'tighten that muscle' - our YoniFlex machine is taking the place of your brain, and contracting that muscle automatically.

Now let's get technical:

Its not enough simply to stimulate your muscles into contracting.  Different muscle groups respond differently to different stimulation.  After many years and thousands of hours of research done by many scientists over the past 20+ years it has been determined that different muscles react to different levels of stimulation.  

Here is a breakdown of the specifications within the Yoniflex product: NERD ALERT!

Hz (Hertz) - This is the number of electric pulses per second.  It is understood after many studies that lower levels of Hz (1-15) are better suited for slower responding muscles, and higher levels (35hz-45hz) are better suited for fast responding muscle fibers.  More then 45Hz is designed to treating muscle fatigue and promoting muscle strength and flexibility.  We use this data to optimize our workout programs based on your specific needs.

uS (pulse width) - This is the duration of a single pulse.  The wider this pulse is, the more muscle penetration will occur. 

Taking these two primary metrics into account, we have developed a number of exercise routines targeted toward specific challenges you may be experiencing.

YoniFlex Pelvic Floor Workout Example: 

We have a program designed specifically for a lack of sensitivity of your vagina.  If you are finding you just can't feel like you used to, this program is for you! Here are the details of this program:

Lack of Sensitivity Workout Details:

  • Phases 5 - From 3-10 minutes per phase
  • Hz - Range from 3hZ to 40Hz
  • Pulse width range from 200-250
  • Work time (in seconds) - 4
  • Rest time (in seconds) 4-6
  • Duration of workout: 25 Minutes

So in this example you can see how we have specifically designed a workout routine around those with lack of sensitivity issues.  The Hz, or number of contractions per second - gradually will increase throughout the workout.  Each muscle contraction will last 4 seconds, with the rest time between contractions increasing from 4 to 6 seconds as the workout moves along.  The pulse width - or the width of a single pulse will reduce near the end of the workout.

This is just one of the 11 different programs we have setup with our YoniFlex.  We have pelvic floor workout programs targeted at the following issues:

  • Pain Relief
  • Prolapse (organs moving into vaginal area or extending out of the vagina)
  • Stress Incontinence (Dribbling during exercise/jumping/bending over)
  • Overactive Bladder (Frequent urge to urinate)
  • Lack of Sensitivity
  • Endurance Training
  • Pelvic Floor Relaxing
  • New Mother's after childbirth


I hope this article helped explain to you the science behind the YoniFlex EMS pelvic floor exercise machine!  There are many additional scientific research articles, papers, and books written about Electric muscle stimulation that are available.  If you would like to learn even more, just contact me and ask!

YoniFlex is now available!   Free Shipping in North America!



 But wait...  There's even more!

If you want to really deep dive into the science, here are a number of additional journal entries, studies, and research done on Electrical Muscle Stimulation in many different forms.  Here are a handful of interesting ones to review:

From US National Library of Medicine National Institute of Health: 

From the Simon Foundation for Continence:

  • (EMT) is a useful therapy or treatment for men and women who would benefit from pelvic floor exercises due to stress urinary incontinence, or as a preventative step before prostate treatment.    --- ARTICLE:  Electric Stimulation of the pelvic Floor Muscles

From the Journal of Applied Physiology:

 From Critical Care Journal:

 From Urology gold Journal

From NCBI:



In all cases above, I added the emphasis ;)


Stay Awesome,