Quick Overview
Most people pick one fitness goal — get stronger, build muscle, or tone up. What makes this research extraordinary is that scientists from the University of Extremadura in Spain found significant improvements across all of them simultaneously. They analyzed 26 independent studies covering 1,183 real people aged 20 to 77 — both active and non-active adults — and every single measured outcome significantly and consistently favored Whole Body EMS. The full details of what that means for your training are definitely worth reading.
We always provide direct links to the original research at the end of every article so you can review the evidence yourself.
Scientists Analyzed 26 Studies on Whole Body EMS — Here's What 1,183 Participants Revealed
When researchers pooled every available piece of quality evidence on Whole Body EMS into a single definitive analysis, four outcomes were measured. All four were statistically significant.
One study can raise a question. Two or three can begin to suggest a pattern. But what happens when scientists gather every credible piece of available evidence, combine it into a single rigorous analysis, and subject the whole thing to the most demanding statistical scrutiny available?
That is precisely what a team of researchers from Spain and Portugal set out to do. And what they found tells the most comprehensive story yet about what Whole Body EMS can do for the human body.
The Researchers and Why This Paper Carries Weight
This systematic review and meta-analysis was led by researchers from the University of Extremadura in Spain and the Sport Sciences School of Rio Maior in Portugal, with additional contributors from institutions in Chile.
The team followed PRISMA guidelines — the internationally recognised gold standard framework for conducting and reporting systematic reviews — and searched five major scientific databases: PubMed, Web of Science, Scopus, SPORTDiscus, and EMBASE.
Their findings were published in Medicine — a peer-reviewed journal distributed by Wolters Kluwer Health, one of the world's most established medical and scientific publishing companies, headquartered in the Netherlands. Wolters Kluwer publishes peer-reviewed journals across medicine, science, and health — and their editorial standards are internationally recognised.
Spain, it is worth noting, has one of Europe's most productive scientific communities — consistently ranked among the world's leading nations for research output in sports science and exercise physiology. A multi-institutional Spanish-led review of this scale carries genuine scientific authority.
What This Study Actually Did
Rather than running a single new experiment, these researchers did something more powerful. They gathered 26 separate studies that had already investigated Whole Body EMS, rigorously assessed each one for quality and methodology, and pooled their combined data into a single, authoritative analysis.
The total participant count across all 26 studies was 1,183 people. Ages ranged from 20 to 77 years — covering young adults through to older populations. Studies included both active and non-active adults. Intervention programmes ranged from 4 weeks to 54 weeks in duration.
Four specific outcomes were measured: muscle mass, body fat, muscle strength, and muscle power.
The Results — Four Outcomes, Four Statistically Significant Findings
Here is where the paper becomes genuinely compelling.
When the researchers combined and analysed all available evidence, every single measured outcome showed statistically significant results in favour of the Whole Body EMS groups. Not one. Not two. All four.
Muscle strength delivered the strongest result. Highly statistically significant (p < 0.0001) across 19 studies and 28 different muscle groups, this is the kind of result that leaves very little doubt in the data. The Whole Body EMS groups were measurably, consistently stronger.
Muscle mass showed significant positive effects (p = .002) across 14 studies. The Whole Body EMS groups consistently showed more muscle mass than comparison groups who trained without EMS.
Muscle power — the ability to generate force quickly, directly linked to a toned, capable, athletic physique — also showed significant improvement (p = .04) across 7 studies.
And across 17 studies, researchers observed significantly more favourable body composition outcomes in the Whole Body EMS groups (p = .003) compared to non-EMS groups — a finding that speaks directly to anyone working toward a leaner, more defined result from their training.
Every outcome. Every measure. Statistically significant.
Who Does This Apply To?
One of the most striking details in this paper is the breadth of participants it represents. With ages spanning 20 to 77, and with both active and non-active adults included, these findings are not confined to elite athletes or a specific demographic.
The researchers note that results apply across the full spectrum of physical activity levels — from those just beginning a fitness journey to those who already train regularly. For anyone working toward better muscle tone, greater strength, more muscle mass, or improved body composition, the diversity of participants represented in this analysis makes the findings directly relevant.
Why This Paper Is Different
The three other studies explored in this series each looked at a specific population or specific condition. This paper looked at everything — 26 studies worth of evidence, more than 1,000 participants, across multiple populations, exercise types, ages, and durations.
It is the broadest, most comprehensive review of Whole Body EMS evidence presented here — and its conclusion is unambiguous.
"WB-electromyostimulation has significant positive effects on muscle mass, body fat, strength, and power."
That is not one researcher's opinion. That is the combined conclusion drawn from 26 independently conducted scientific studies.
This article summarises findings from Rodrigues-Santana et al. (2023), "The effects of whole-body muscle stimulation on body composition and strength parameters: A PRISMA systematic review and meta-analysis," published in Medicine*, Wolters Kluwer Health. Whole Body EMS devices are fitness and wellness accessories. Individual results vary.*
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Research Summary
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