Can Electrical Muscle Stimulation Really Help Recovery After Joint Replacement? 2025 Study Published in Public Health Journal

person Savannah Martin
calendar_today Jan 24, 2026
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At ORIEMS FIT Research Digest, we regularly share interesting science in very simple language.
Our goal is to spark curiosity and help everyday people explore real research for themselves.

This article is a simplified explanation of one scientific paper.
At the end of this post, you’ll find a link to the original study so you can read it yourself, collect it, or fact-check our summary anytime.

How to Read This Blog (Important)

This article is a simplified educational summary of a scientific research paper.
It is written to help everyday readers understand what researchers studied and observed.

This blog post is NOT a substitute for reading the original research paper.
Important details, limitations, and full scientific context can only be found in the original publication.

Readers who want full accuracy or technical detail should read the original study directly.

Research Details (Simple Q&A)

Who did this research and when?

This study was conducted by orthopedic researchers from large public hospitals in China, including:

Lishui Municipal Central Hospital
Qingyuan County People’s Hospital
No.2 People’s Hospital of Yuhang District

The paper was received in November 2024 and published in May 2025.

Who funded the research?

The study reported no commercial funding, reducing the risk of product bias.

What was this research about?

Researchers wanted to understand whether neuromuscular electrical stimulation (NMES) could support recovery after joint replacement surgery.

NMES is a form of electrical muscle stimulation that sends gentle electrical signals to muscles to help them contract.

Who was studied?

549 patients
All had undergone joint replacement surgery
Data came from 10 randomized controlled trials
Patients were followed during post-surgery rehabilitation

What did the researchers do?

They reviewed and combined results from 10 clinical trials published between 2009 and 2024.

They compared:

Standard rehabilitation with NMES
Standard rehabilitation without NMES

**What Did the Researchers Actually Observe?

(With Measurable, Factual Evidence)**

This meta-analysis pooled results from 10 randomized controlled trials with 549 participants to compare outcomes between people who received neuromuscular electrical stimulation (NMES) plus standard rehabilitation vs standard rehabilitation alone after joint replacement surgery.

📌 1. Pain Scores Were Significantly Lower

When combining data from the included studies, NMES was associated with a reduction in pain scores compared to controls.
The standardized mean difference (SMD) was –0.40, meaning the NMES groups reported less pain on average than controls in the combined analysis.
This was statistically significant, although there was high variability between studies (I² = 82%).

What this means (simple):
People in the NMES groups tended to report lower pain levels following joint surgery than those who had standard rehab alone.

📌 2. Quadriceps (Thigh Muscle) Strength Improved

When quadriceps muscle strength was analyzed across studies, NMES showed a positive effect compared to controls.
The meta-analysis reported high consistency for this outcome (I² = 95%), indicating a consistently stronger effect across trials.

What this means (simple):
Adding NMES to rehabilitation was linked with stronger thigh muscles (quadriceps), which are key for walking and everyday movement.

📌 3. Functional Movement Tests Improved

Stair-Climbing Test

NMES had a significant positive effect on performance in the stairs-climb test (P < 0.01).
Better stairs performance suggests improved dynamic function and strength during a real-world task.

Timed Up and Go (TUG) Test

There was a small positive effect of NMES on the TUG test (a measure of mobility and balance) when not adjusted.
After accounting for baseline differences, the analysis still showed a significant positive effect (P < 0.01).

What this means (simple):
People receiving NMES tended to move better in functional tests such as standing up, walking, and climbing stairs — all key activities of daily life.

📌 4. Overall Functional Recovery Scores Were Better

Across studies that reported composite functional scores, NMES was associated with a statistically significant positive effect (P = 0.01).

What this means (simple):
When researchers combined various measures of activity and recovery into a score, people in NMES groups tended to score higher, suggesting better overall function after surgery.

Bottom Line (Measured Findings)

Outcome	Measurable Effect*	Statistical Notes
Pain	Lower pain (SMD = –0.40)	Significant, but study results varied widely
Quadriceps Strength	Higher strength	Significant positive effect
Stair Climbing	Better performance	P < 0.01
Mobility (TUG)	Better mobility	P < 0.01 after adjustment
Functional Scores	Higher overall function	P = 0.01

*Results refer to standardized comparisons between NMES + rehab vs rehab alone.

Why This Study Is Different

This was not a single experiment.

It was a systematic review and meta-analysis, meaning researchers combined results from many hospitals, many trials, and hundreds of patients.

That makes it more powerful than a small, single-center study.

What This Helps Us Understand (Non-Medical)

This research helps scientists better understand:

How muscle stimulation may support movement and strength recovery
Why electrical stimulation is often studied alongside rehabilitation
How recovery involves muscles, movement, and daily function—not just pain

No treatments or instructions are recommended here.

Study Information

Original Paper Title
The Impact of Neuromuscular Stimulation on the Rehabilitation Outcomes of Patients Following Joint Replacement Surgery: A Systematic Review and Meta-Analysis

Simplified Title
Can Electrical Muscle Stimulation Support Recovery After Joint Replacement?

Journal
Iranian Journal of Public Health (peer-reviewed, university-published)

DOI (Permanent Research Link)
https://doi.org/10.18502/ijph.v54i5.18628

Why this source is trustworthy

Peer-reviewed journal
Conducted by public hospitals
Uses randomized controlled trials
Transparent methods and statistics

Summary Table

Item	Details
Study focus	Electrical muscle stimulation after joint replacement
Participants	549 post-surgery patients
Study type	Systematic review & meta-analysis
Electrical method	Neuromuscular electrical stimulation (NMES)
Key observations	Lower pain, stronger muscles, better function
Unique angle	Combines 10 trials into one analysis
Interpretation note	This table summarizes selected observations only. Full context is available in the original research paper.

Let’s Discuss

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Mandatory Disclaimer

This blog post is for informational and recreational purposes only.
It is not medical advice and not a substitute for professional guidance or the original research paper.

Always consult a qualified healthcare professional before making health-related decisions.
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