Belgian review finds adding EMS to physiotherapy may help rebuild weaker legs after stroke

Purpose

This post explains a 2024 scientific review in plain language.
The researchers asked one clear question.
Can electrotherapy, including EMS, help lower limb muscles after stroke?
They compared stimulation plus usual rehab with usual rehab alone, or with sham stimulation.
They wanted evidence on muscle strength and muscle size, not slogans.
The finding is hopeful, not a miracle claim.
EMS was studied as an add-on to physiotherapy, not as a standalone cure.

A stroke can leave one side of the body weak.
That weakness has a name: hemiparesis.
Weak legs make walking slower.
They make stairs harder.
They shrink daily life.
Gym-style strength work helps many people.
It is tough when a limb barely moves.
That is why scientists keep testing gentle tools that still make a muscle work.

In Brussels, a rehab team went hunting through the evidence.
Lead author Ruben Debeuf worked with colleagues at Vrije Universiteit Brussel.
Partners came from Ghent University and the University of Antwerp.
An epidemiology unit in Milan also joined.
The journal was Disability and Rehabilitation.
The publisher was Taylor & Francis, a long-established British scientific house.
The protocol sat on PROSPERO before the search began.
The authors declared no conflict of interest.
That is why this summary can sit on a public blog with a straight face.
It is reporting a peer-reviewed paper, not inventing a sales pitch.

They searched MEDLINE, Scopus, and Web of Science.
The search ran to 3 November 2022.
Only randomised trials made the cut.
Adults after ischaemic or haemorrhagic stroke were included.
Stimulation had to reach nerves or muscles of the weaker leg through skin electrodes.
Pain-only studies were left out.
Upper-limb-only studies were left out.
Twenty-three trials survived.
They covered 933 people.
About 57 percent were men.
Average ages across studies ran from 47 to 73 years.

Most people were in the chronic stage, more than six months after stroke.
Seventeen trials went into the number-crunching meta-analysis.

What did they actually use?
Some trials used FES during walking or cycling.
Some used motor TES, the style many people call EMS or NMES.
That current is strong enough to make a muscle contract.
A smaller group used sensory stimulation below the twitch threshold.

Sessions often lasted 20 to 60 minutes.
Many programmes ran three to five days a week.
Courses lasted two to twelve weeks.
The important pattern was simple.
EMS or similar stimulation sat on top of usual rehabilitation.

Now the measured progress.

Against conventional physiotherapy, eight trials entered the strength pool.
Muscle strength rose more with electrotherapy.
The pooled effect was a standardised mean difference of 0.63.
The 95 percent confidence interval ran from 0.34 to 0.91.
Heterogeneity was modest, I² = 37 percent.
GRADE rated that evidence moderate.
In research language, that is a medium-sized extra gain.

Against sham stimulation, eight trials were pooled.
Muscle strength still favoured real stimulation.
The standardised mean difference was 0.44.
The interval ran from 0.20 to 0.68.
I² was 38 percent.
GRADE rated that evidence low.
The signal was smaller, but it still pointed the same way.

Muscle size was thinner on the ground.
Three ultrasound trials measured muscle thickness.
They compared stimulation plus usual care with usual care alone.

Thickness increased by a mean 0.11 cm.
The interval was 0.06 to 0.16 cm.
I² was 0 percent.
GRADE again said moderate.
A millimetre here sounds tiny.
On a wasted paretic muscle, that is a real structural hint.

A few trials also peeked at how the muscle fires.
One reported better motor-unit recruitment in the knee extensors.
Another reported higher EMG activity in tibialis anterior and gastrocnemius.
Those extra findings were not the main pooled result.
They still fit the brighter story.
When a weak muscle is asked to work again and again, it can answer.

The authors were careful.
Most volunteers were chronic, not freshly injured.
Many trials used FES, so other EMS recipes still need more tests.
Some papers had risk-of-bias worries.
Sample sizes were not huge.
They said high-quality trials in the acute stage are still needed.
That honesty is part of why the paper is trustworthy.

Here is the bright side they did support.
Adding electrical stimulation to physiotherapy was linked to stronger lower limb muscles.
It was also linked to a small rise in muscle thickness.
For people who cannot load a weak leg the usual way, that extra contractile work matters.
The review does not say a gadget replaces a therapist.
It says the combination looked better than usual care alone.

If this topic touches your family, keep it practical.
Talk to the stroke team or a physiotherapist before using any devices.
Clinic trials used set programmes, not random home experiments.
This article is not an ad for a device.
It is not a TGA product claim.
It is a plain-English walk through a Belgian-led review in a peer-reviewed journal.

The purpose again, in one breath.
This study found moderate evidence that electrotherapy plus physiotherapy can improve lower limb muscle strength and thickness after stroke.

That is a hopeful add-on in rehabilitation.
It is not a promise that EMS heals the brain on its own.
The honest headline is still good news.
When a weak leg needs more chances to work, carefully added EMS may help it do exactly that.

Source: Debeuf R et al. Electrotherapy in stroke rehabilitation can improve lower limb muscle characteristics: a systematic review and meta-analysis. Disability and Rehabilitation. 2025;47(1):16–32. doi: 10.1080/09638288.2024.2334444. Published online 1 April 2024. Taylor & Francis.