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What is Red Light Therapy? Learn the basics of red light therapy and how it fits into everyday wellness routines. How Red Light Works Explore how red and near-infrared light interact with the body at a cellular level. Safety & Best Practices Learn how to use red light therapy safely and build it into your routine.

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CLINICAL RESEARCH · JOINT & MOBILITY

Research on Joint Comfort, Stiffness & Mobility

Explore research examining photobiomodulation in relation to joint function, mobility and physical comfort.

Featured Research

PBM for Knee Osteoarthritis

2025 Randomized Controlled Trial Joint & Mobility
What the study looked at

A double-blind randomized controlled trial evaluated photobiomodulation in adults with symptomatic knee osteoarthritis using a defined 790 nm treatment protocol.

What researchers found

Participants receiving PBM showed improvements in pain and several knee-related outcome measures compared with sham and control groups.

Why it matters

This recent trial adds clinical evidence on PBM for knee osteoarthritis while showing that outcomes are tied to a specific wavelength and treatment protocol.

View Original Study

More Joint & Mobility Research

2024 Systematic Review + Meta-Analysis

Photobiomodulation for Knee Osteoarthritis: Pain & Disability

A review of 10 placebo-controlled studies found PBM was associated with lower resting pain, while evidence for disability and functional outcomes remained less certain.

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2024 Systematic Review + Network Meta-Analysis

How Wavelength May Influence Knee Osteoarthritis Outcomes.

This review compared different low-level light wavelengths and found potential differences in knee pain outcomes, while the overall certainty of evidence remained low.

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2023 Randomized Controlled Trial

PBM Combined With Strengthening Exercise in Knee Osteoarthritis

This randomized trial found that adding PBM to a strengthening exercise program did not provide additional improvements in pain, physical function or quality of life compared with exercise alone.

View Study

What to Look For Across Studies

Wavelength

Which wavelengths were used in the study?

Treatment Parameters

Irradiance, treatment time, distance and treatment schedule.

Participant Group

Who participated in the study and what were their characteristics?

Study Design

RCT, systematic review, meta-analysis and other study designs answer different questions.

Research Context

Research findings are specific to the wavelengths, devices, treatment protocols and participant groups evaluated in each study and should not be assumed to apply to every red light device.

i

Research Note

Research outcomes can vary depending on wavelength, irradiance, treatment time, distance, device design, participant characteristics and study methodology.

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