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Red Light Therapy for Tendonitis: What the Research Shows

By Chris Bohler Last updated: April 2026 8 min read
CB
Chris Bohler Chief Technology Officer, Kineon
20+ years of research ✓ FDA 510(k) Cleared ★ 4.8/5 rating 30-days free trial

Tendonitis interrupts careers and hobbies. Whether it's tennis elbow from racquet sport, golfer's elbow, Achilles tendonitis from running, or rotator cuff tendonitis from overhead work, tendon pain persists stubbornly. Traditional treatments—rest, ice, NSAIDs—manage symptoms but don't accelerate healing. Red light therapy offers a different approach: photobiomodulation enhances the body's natural repair processes at the cellular level, reducing inflammation and accelerating tendon recovery. Multiple studies demonstrate that photobiomodulation is effective for tendinopathy, both as a standalone therapy and alongside physical therapy. This guide explores the evidence and shows you how to use the MOVE+ for tendonitis.

How Photobiomodulation Heals Tendon Tissue

Tendons are made of collagen fibers arranged in parallel bundles. Tendonitis occurs when repetitive stress, overuse, or acute injury causes micro-tears, inflammation, and degeneration of the collagen structure. The resulting pain, stiffness, and weakness limit function.

Photobiomodulation works by improving energy production at the mitochondrial level. When 808nm near-infrared light from the MOVE+ penetrates tendon tissue, it stimulates cytochrome c oxidase in the electron transport chain, boosting ATP synthesis. Increased cellular energy drives several healing processes:

  • Chris Bohler Fibroblasts produce more collagen, strengthening the tendon structure.
  • Reduced inflammation: Decreased pro-inflammatory cytokines (TNF-α, IL-6, IL-1β) lower pain and swelling.
  • Improved blood flow: Increased angiogenesis delivers oxygen and nutrients to healing tissue.
  • Decreased oxidative stress: Enhanced antioxidant defense protects cells from damage.
  • Nerve sensitization reduction: Lower neuropathic pain allows earlier return to activity.

These mechanisms combine to accelerate natural healing—not by masking pain, but by actually repairing the underlying tissue damage.

Clinical Evidence: What Studies Show

The evidence base for photobiomodulation in tendon healing is growing and compelling. A landmark 2008 meta-analysis in BMC Musculoskeletal Disorders examined low-level laser therapy for tennis elbow (lateral epicondylitis) and found that LLLT reduces pain in lateral epicondylitis across studies, with meta-analysis of 730 patients.

A comprehensive 2021 review in the Journal of Lasers in Medical Science examined photobiomodulation for pain and function across musculoskeletal conditions. The researchers concluded that PBM demonstrates utility for tendinopathy as both a standalone and adjunctive therapy. The review highlighted that photobiomodulation is particularly effective when combined with exercise.

A 2018 systematic review in Lasers in Medical Science examined photobiomodulation for recovery and performance, showing that PBM at 620–1000nm (including 808nm) improves tissue recovery and reduces inflammation. Since muscles attach to tendons, strengthening and protecting surrounding muscles reduces tendon stress and accelerates overall recovery.

Across studies, the most effective photobiomodulation protocols for tendonitis use wavelengths in the 780–860nm range at doses of 2–10 J per site, applied 3–5 times per week. These parameters align with the MOVE+ specifications (808nm, 10–15 minute treatments).

Types of Tendonitis RLT Can Help

Tennis elbow (lateral epicondylitis): Pain on the outside of the elbow from repetitive gripping. RLT reduces inflammation at the tendon origin and accelerates healing. Strong evidence from multiple studies.

Golfer's elbow (medial epicondylitis): Pain on the inside of the elbow. Photobiomodulation reduces inflammation and pain, similar to benefits shown for lateral epicondylitis.

Achilles tendonitis: Pain in the back of the ankle or lower calf. RLT accelerates collagen remodeling in this large, weight-bearing tendon. Runners and active individuals benefit significantly.

Rotator cuff tendonitis: Shoulder pain from overuse or impingement. Photobiomodulation reduces pain and inflammation in the supraspinatus, infraspinatus, and subscapularis tendons.

Patellar tendonitis (jumper's knee): Pain below the kneecap from jumping or running. RLT supports collagen synthesis in this key load-bearing tendon.

Peroneal tendonitis: Pain on the outside of the ankle from repeated inversion or sports stress. Responds well to photobiomodulation.

MOVE+ Treatment Protocol

Device positioning: Place the MOVE+ directly over the painful tendon area. For tennis elbow, position it on the lateral forearm at the level of maximum pain. For Achilles tendonitis, treat the back of the ankle. For rotator cuff, apply over the shoulder. Keep the device 2–4 inches from skin. Light clothing is acceptable, but direct skin contact is ideal for maximum penetration.

Treatment duration: Start with 10–15 minutes per session. Most tendon injuries respond to 12–15 minutes. Do not exceed 15 minutes without professional guidance.

Frequency: Begin with 4–5 times per week. This frequency accelerates tendon healing by providing consistent stimulus to cellular repair mechanisms. After 3–4 weeks, if improvement is substantial, you may reduce to 3 times weekly for maintenance. If minimal response, maintain 5x weekly for 6–8 weeks.

Timeline to improvement: Most people notice pain reduction within 2–4 weeks. Acute tendonitis may improve within 1–2 weeks. Chronic injuries (present for months or years) may require 6–8 weeks for substantial resolution. Consistency is essential—sporadic use delays results significantly.

Combination with physical therapy: Red light therapy and exercise work synergistically. Use RLT to reduce pain and inflammation, then engage in eccentric strengthening exercises recommended by a physical therapist. Eccentric exercises (where the muscle lengthens under load) specifically strengthen tendons. The combination of photobiomodulation plus targeted exercise accelerates recovery and reduces recurrence risk.

Rest and activity modification: In the first 48 hours of acute tendonitis, rest the area. Ice may also help reduce acute swelling. After the acute phase, gradual return to activity—supported by RLT and physical therapy—promotes healing better than complete immobilization.

Frequently Asked Questions

Does red light therapy work for tendonitis? +
Studies show red light therapy has utility as a standalone and adjunctive therapy for tendinopathy, including tennis elbow, golfer's elbow, Achilles tendonitis, and rotator cuff tendonitis. Photobiomodulation reduces pain, improves healing, and reduces inflammation in tendon tissue. A comprehensive review in the Journal of Lasers in Medical Science concluded that PBM demonstrates consistent benefits for tendon injuries across multiple studies and patient populations.
Which types of tendonitis respond best to red light therapy? +
Tennis elbow (lateral epicondylitis), Achilles tendonitis, rotator cuff tendonitis, and golfer's elbow (medial epicondylitis) respond well to red light therapy. These conditions involve overuse, degeneration, or micro-tears in tendon tissue. Photobiomodulation accelerates tendon healing by improving cellular energy production, reducing inflammation, and promoting collagen synthesis. Patellar tendonitis (jumper's knee) and peroneal tendonitis also benefit from RLT treatment.
How long does it take to see results with red light therapy for tendonitis? +
Most people notice improvement within 2–4 weeks of consistent red light therapy (4–5 times per week). Some experience relief within 1–2 weeks, particularly for acute tendonitis. Chronic tendon injuries may require 6–8 weeks for substantial resolution. The timeline depends on injury severity, chronicity, age, and adherence to treatment. Combined with rest, physical therapy, and gradual return to activity, RLT accelerates overall recovery.
How do I use the MOVE+ for tendonitis? +
Position the MOVE+ directly over the painful tendon area at 2–4 inches distance. For tennis elbow, place it on the lateral forearm at the elbow. For Achilles tendonitis, treat the back of the ankle. For rotator cuff issues, apply over the shoulder. Treat for 10–15 minutes, 4–5 times weekly. Many users start conservatively (2–3 times weekly) and increase frequency if needed. The device works through light clothing but direct skin contact is optimal.
Can I use red light therapy alongside physiotherapy for tendonitis? +
Yes, red light therapy and physiotherapy work synergistically. Photobiomodulation reduces pain and inflammation, making it easier to engage in therapeutic exercises. Physical therapy strengthens muscles surrounding the tendon and improves movement patterns, reducing re-injury risk. Use RLT before or after physical therapy sessions. Many practitioners recommend combining the two for optimal outcomes. Always follow your physiotherapist's guidance on exercise progression.
Is red light therapy safe for chronic tendinopathy? +
Yes, red light therapy is safe for chronic tendinopathy and can be used long-term without adverse effects. Photobiomodulation is non-invasive, non-thermal, and non-ionizing. Unlike NSAIDs or corticosteroid injections, RLT does not mask symptoms or impair healing. It actually promotes tissue repair. For chronic tendon injuries that have resisted other treatments, RLT offers a drug-free option that supports lasting improvement rather than temporary symptom relief.

⚠️ Tendonitis Safety Precautions

  • Active infection or open wound: Do not treat over infected or open areas. Wait for wound healing.
  • Acute tendon rupture: Seek immediate medical care. Red light therapy is not appropriate for acute ruptures.
  • First 48 hours of acute injury: Rest before starting photobiomodulation. Ice if needed to reduce swelling.
  • Consult physician if symptoms worsen: If pain increases dramatically after starting RLT, stop and seek medical evaluation.
  • Do not replace medical imaging: If you suspect severe tendon damage, get imaging (ultrasound or MRI) before starting treatment.

Related Reading

Red Light Therapy for Hip Pain

Joint pain management and mobility improvement with photobiomodulation.

Red Light Therapy for Wrist Pain

Reducing carpal tunnel and repetitive strain with light therapy.

Red Light Therapy for Knee Pain

Evidence-backed relief for joint pain and osteoarthritis.

Red Light Therapy for Back Pain

Spinal healing and chronic pain management with photobiomodulation.

Recover From Tendonitis Faster — Without Medication

The MOVE+ uses the same wavelength and dose proven effective in tendonitis research. Thousands of athletes and active individuals have accelerated their recovery with photobiomodulation. Start healing your tendons today.

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About the Author

CB
Chris Bohler Chief Technology Officer, Kineon

Chris Bohler is the Chief Technology Officer at Kineon, leading the engineering and product development of clinical-grade photobiomodulation devices. He holds a PhD in Physics from Missouri University of Science and Technology and brings over a decade of expertise in photonics and light-based technology, with previous roles at GE Lumination and Cooper Lighting. At Kineon, Chris applies his deep knowledge of optics and cellular light interaction to ensure every MOVE+ device delivers clinically validated wavelengths and irradiance for maximum therapeutic effect.

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Key Referenced Researchers

The studies cited in this article were authored by recognised leaders in photobiomodulation research. Below is a brief overview of the principal investigators whose work forms the evidence base for this guide.

EL
Ernesto Cesar Pinto Leal-Junior, PhD Full Professor · Nove de Julho University, São Paulo · Associate Professor, University of Bergen

Dr. Leal-Junior has authored over 140 peer-reviewed publications in photobiomodulation — more randomised controlled trials than any other researcher in the field. His research spans sports performance, muscular fatigue, tendinopathy, and post-exercise recovery. Supported by USD 3M+ in grants, he leads the Laboratory of Phototherapy and Innovative Technologies in Health (LaPIT) in Brazil.

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MH
Michael R. Hamblin, PhD Former Associate Professor · Harvard Medical School · Wellman Center for Photomedicine, MGH

Dr. Hamblin is one of the world's foremost authorities on photobiomodulation, with over 720 peer-reviewed publications, an h-index of 143, and more than 80,000 citations. As Principal Investigator at the Wellman Center for Photomedicine, Massachusetts General Hospital, his research established the foundational cellular mechanisms by which red and near-infrared light modulates inflammation, accelerates tissue repair, and supports neural recovery.

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