Why Two People Get Different Results From the Same Device
Medically reviewed by
4 independent reviewers
Andrew Conrad Barile, PT, DPT
Doctor of Physical Therapy (DPT) | Licensed Physical Therapist (PT) | CEO and Founder, Xtreem Pulse LLC
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Dr. Andrew Conrad Barile is a Doctor of Physical Therapy and the CEO and Founder of Xtreem Pulse LLC, the engineering company behind PureLift. He earned his Doctorate in Physical Therapy from Daemen College and is a licensed physical therapist.
He brings over two decades of clinical and entrepreneurial experience across physical therapy, craniosacral therapy and medical device innovation, built on a working knowledge of human anatomy and muscle physiology.
For PureLift LAB he reviews how current is delivered across all ten levels, from sub-sensory nanocurrent and skin-level microcurrent to motor-level EMS, and how the Infuse pass fits into the same ten-minute routine.
Bertica M. Rubio, M.D.
Board-Certified Physician, Dartmouth Medical School | Medical Director, Antiaging Regenerative Medicine Clinic
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Dr. Bertica M. Rubio is a board-certified physician and Medical Director of the Antiaging Regenerative Medicine Clinic in Redlands, California. She earned her Doctor of Medicine from Dartmouth Medical School and completed her pediatrics residency at UC Irvine Medical Center.
With decades of clinical experience, she specialises in age management medicine, regenerative medicine, wound healing and growth factor therapies, and her practice integrates evidence-based medical science with advanced aesthetic treatment.
For PureLift LAB she reviews articles for medical accuracy across the whole dial, from the gentle nanocurrent and microcurrent settings through to muscle-level EMS and the Infuse pass.
Daniel Grinberg, MD, FACS
Board-Certified Otolaryngologist | Head and Neck Surgeon | Fellow, American College of Surgeons | Mount Sinai
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Daniel Grinberg, MD, FACS is a board-certified otolaryngologist and head and neck surgeon at ENT and Allergy Associates in West Nyack, New York. He earned his medical degree from Columbia University College of Physicians and Surgeons.
He completed his otolaryngology residency at New York University Medical Center, serves as Assistant Clinical Professor at Mount Sinai School of Medicine, and is a Fellow of both the American College of Surgeons and the American Academy of Otolaryngology.
For PureLift LAB he brings a wider clinical lens, connecting at-home facial stimulation from microcurrent to EMS to the anatomy underneath, with the same rigour we apply to every device specification.
Prof. Dr. med. Ivo Buschmann
Chair of Angiology, Medizinische Hochschule Brandenburg | Clinic Director, University Clinic for Angiology
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Prof. Dr. med. Ivo Buschmann is Chair of Angiology at the Medizinische Hochschule Brandenburg Theodor Fontane and Clinic Director of the University Clinic for Angiology at the Brandenburg University Hospital.
He trained at the University of Hamburg, was a Max Planck Society Fellow at the Max Planck Institute for Heart and Lung Research, and held senior consultant posts at the Charite Universitatsmedizin Berlin before his appointment as Chair in 2016.
One of Europe's leading authorities on arteriogenesis, with over 150 peer-reviewed publications and US and EU patents, he reviews for PureLift LAB how the evidence on electrical stimulation is read and where its limits lie.
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Most of the variation between two people using the same device comes from six things, and only one of them is out of your hands.
This article explains what is actually happening, such as:
- why the starting condition of the muscle changes the ceiling
- the difference three sessions a week makes against one
- working level against minimum tolerable level
- how much of the variation is simply contact quality
- why some faces show change earlier than others
and many more!
Review sections in this category are full of both outcomes from the same device, and this is usually why.
Key Points:
Consistency explains more of the difference than any other variable, and three to five sessions a week is the threshold that matters.
Working at the minimum level you can feel rather than a firm comfortable level slows results substantially.
Poor contact, meaning a thin or drying serum layer, quietly reduces delivered charge no matter what the dial says.
Where you start matters: a face with more muscle slackness has more visible room to change than one that does not.
Age, skin thickness and bone structure affect what is visible, and none of that changes what the muscle is doing underneath.
Consistency, which explains most of it
The research that shows change runs protocols of repeated sessions over twelve weeks, and Kavanagh and colleagues measured an 18.6 percent increase in cheek muscle thickness across 108 women on that basis (10.1111/jocd.12007).
Three to five sessions a week is the range that produces the results people describe; one session a week is maintenance-level work applied to a building problem.
Two people who each own the device for twelve weeks can be forty sessions apart, which is the single largest source of different outcomes.
This is also why a device you find comfortable outperforms one you find impressive, because you will actually use it.
Working level against minimum level
The target is firm and comfortable, where you can clearly feel the pull and would happily continue for the full three minutes a side.
Many people settle at the lowest level they can feel, which is below the level that asks the muscle to work.
Level should rise over the first few weeks as tolerance builds, and someone still at their week-one setting in week eight is doing week-one work.
It should never be painful, and pain usually means contact rather than level, which we cover separately.
Contact quality, the invisible variable
Current spreads through a wet conductive layer, so a thin or drying layer reduces the charge that actually arrives regardless of what the dial reads.
Two people at level 6 with different serum discipline are not doing the same treatment.
Skin should look visibly wet for the whole pass, and reapplying between sides is normal rather than excessive.
This is the cheapest thing on the list to fix and the most commonly wrong.
Where you start
Someone whose lower face has begun to slacken has more visible room to change than someone whose face is still firm.
That means the person with the more advanced starting point often reports a larger change, while the person using it preventatively sees less and may be getting more value.
Skin thickness and bone structure affect how much muscle change reads on the surface, and neither is something you influence.
Body-fat changes during the same period, including from GLP-1 medication, change facial volume independently and can mask or exaggerate what the device is doing.
Technique
Direction and placement matter, since you are working along muscles rather than over an area.
Spending your three minutes evenly across the whole side is less effective than spending it where the face has actually changed.
Rushing the pass reduces the time any given point spends under the probe.
None of this is difficult, and it is the part that improves fastest with attention.
Expectation
Two people can get the same physical change and describe it completely differently depending on what they were promised.
Depuffing is same-day, muscle change takes weeks, and skin texture is a separate question from either.
Anyone expecting a surgical result from a ten-minute session will be disappointed by an outcome someone else would call excellent.
We would rather set the expectation honestly and have you judge us against it, which is why our timelines say weeks four to eight for first clear change and twelve for the fuller picture.
This comparison sits inside our full map of the category, where we set out all 33 devices we track, what each one carries and what each brand publishes: Nine Technologies on One Dial, What the Rest of the Market Actually Carries.
Guidance checked against the published research cited and PureLift device specifications on 21 September 2026.