What Is Photobiomodulation?
Photobiomodulation (PBM) is the therapeutic use of red and near-infrared light to influence how cells produce energy and manage inflammation. Once used mainly for wound healing, it has drawn growing interest in orthopedics and sports medicine as a non-invasive recovery tool.
How Is It Thought to Work?
Light in specific wavelengths is absorbed by an enzyme in your cells' mitochondria (cytochrome c oxidase), which can increase cellular energy (ATP) production. Downstream effects reported in research include:
- Reduced pro-inflammatory signals and a shift toward a more reparative state
- Stimulation of fibroblasts and collagen for tendon and soft-tissue healing
- Improved local blood flow and, in some studies, effects on nerve-related pain
PBM follows a "biphasic" dose response - too little light does little, and too much can blunt the effect - so appropriate settings matter.
What Is It Used For?
The most-studied uses are chronic tendon problems (tennis elbow, Achilles, patellar and rotator cuff tendinopathy), knee osteoarthritis pain, muscle recovery, and post-operative and orthobiologic-adjunct recovery. Results across studies are encouraging but mixed, largely because devices and dosing vary widely.
What to Expect
PBM is non-invasive and painless - a light source is applied over the target area for a set time. There is no downtime.
Evidence Status
PBM is an emerging, adjunctive therapy. Some meta-analyses show modest pain benefit in knee OA and value alongside exercise, but the certainty of evidence is limited and optimal dosing is still being defined. It is best understood as a complement to, not a replacement for, established treatment.
FAQ
Is PBM the same as a regular "laser treatment"?
PBM uses specific red and near-infrared wavelengths at doses meant to stimulate cells, not to cut or heat tissue. Wavelength and dose are what matter.
What is it used for in orthopedics?
Chronic tendinopathies, knee osteoarthritis pain, muscle recovery, and post-operative or orthobiologic-adjunct recovery.
Does it hurt or require downtime?
No. It is non-invasive and painless, with no recovery time.
Does it work?
Evidence is promising but mixed. It can help as an adjunct for some conditions, but it is not a standalone cure and results depend heavily on correct dosing.
Physician-Authored Review.
This overview is based on Dr. Rahman's peer-reviewed review, Photobiomodulation in Orthopaedics: Mechanisms, Clinical Applications, and Emerging Directions (Journal of Orthopaedic Experience & Innovation, 2026).
FDA Disclaimer: Photobiomodulation is an adjunctive therapy and is not a substitute for established medical or surgical care. This content is for educational purposes only and does not replace professional medical advice.