If you’ve ever struggled with tendinopathy—whether it’s a nagging shoulder tendonitis from overuse, an Achilles tendon injury from sports, or even equine tendon issues that limit performance—you know how frustrating and debilitating these conditions can be. Tendons play a critical role in transmitting force from muscles to bones, but when they become inflamed or damaged, everyday movements (or competitive performance, for athletes and horses alike) can feel unbearable. Fortunately, research continues to highlight laser therapy as a promising solution for tendinopathy treatment. Let’s dive into the science, real-world studies, and transformative effects of laser therapy on tendon healing.
Understanding Tendinopathy: More Than Just Inflammation
First, it’s important to grasp what tendinopathy really is. Contrary to common belief, it’s not just simple inflammation—it’s a complex process involving damage to the tendon tissue itself, often triggered by repetitive stress, injury, or age-related wear and tear. Tendons are tough, fibrous tissues, but when they’re overloaded, their ability to repair themselves slows down, leading to pain, stiffness, and reduced mobility. For humans, this might mean struggling to lift your arm, run, or grip objects. For horses—especially racing or sport horses—tendinopathy can end careers if left untreated.
Traditional treatments like rest, anti-inflammatory drugs, or physical therapy can help, but they often take time and may not address the root of the tissue damage. That’s where laser therapy steps in, offering a targeted, non-invasive approach to stimulate healing at the cellular level.
How Laser Therapy Works for Tendinopathy
Laser therapy for tendinopathy operates on the principle of using specific wavelengths of light to penetrate the skin and reach the damaged tendon tissue. There are two primary types of laser therapy used in tendon treatment: low-level (or low-power) laser therapy and high-power laser therapy. Both work by interacting with cells in the tendon, promoting processes like:
- Increased blood flow to the injured area, delivering oxygen and nutrients critical for repair.
- Reduced inflammation and pain by targeting inflammatory cells and blocking pain signals.
- Stimulation of collagen production, the main structural protein in tendons that gives them strength and flexibility.
Low-level laser therapy (LLLT), also known as cold laser therapy, uses monochromatic, coherent light with low power output. Its use in tendon injuries dates back to the 1960s, and since then, researchers have documented its ability to accelerate healing without the side effects of medications or invasive procedures. High-power laser therapy, on the other hand, uses higher energy outputs and has emerged as a viable option for more severe tendon injuries, including those in sport horses.
The Science Backs It Up: Key Studies on Laser Therapy for Tendinopathy
Numerous studies have validated the effectiveness of laser therapy for tendinopathy in both humans and animals. Let’s explore three groundbreaking research papers that shed light on its benefits:
1. Low-Level Laser Therapy: Effective for Human Tendinopathy
A 2015 systematic review published in Acta Ortop Bras set out to evaluate the latest research on low-level laser therapy for tendinopathy. Researchers searched major databases (PubMed, Medline, CAPES, and LILACS) and selected three high-quality studies for analysis. The review concluded that low-level laser therapy is significantly more effective than a placebo for treating tendinopathy. While the authors noted a need for more large-scale studies, the consistent results confirmed that LLLT provides meaningful relief and promotes healing for tendon injuries. This is particularly promising for patients seeking a non-pharmaceutical, non-surgical option to manage pain and restore function.
2. Laser Therapy Outperforms Drugs for Shoulder Tendonitis
Shoulder tendonitis—common in athletes, office workers, and anyone with repetitive arm movements—can be especially stubborn. A 1989 randomized controlled trial published in Scand J Rheumatol tested the efficacy of low-power infrared laser therapy (904 nm) on 30 patients with supraspinatus or bicipital tendonitis. Patients were randomly assigned to one of three groups: active laser therapy (three times weekly for 2 weeks), dummy laser (placebo), or drug treatment (naproxen sodium, a common anti-inflammatory).
The results were striking: Active laser therapy showed significant improvements in all seven assessment measures—including shoulder extension, flexion, abduction (objective metrics), and pain, stiffness, movement, and function (subjective metrics)—compared to the placebo. Moreover, laser therapy outperformed naproxen sodium for the objective measures and pain relief. While the drug improved movement and function slightly, it did not match the laser’s holistic benefits. This study was one of the first to demonstrate that laser therapy is not just a placebo effect but a superior treatment for shoulder tendinopathy.
3. High-Power Laser Therapy: A Game-Changer for Equine Tendon Injuries
Tendinopathy isn’t just a human problem—sport horses often suffer from superficial or deep digital flexor tendon injuries that can end their racing or competition careers. A 2021 study published in Arch Razi Inst. investigated the use of short-term high-power laser therapy (maximum output power of 15000 MW) on 50 racing horses with tendon injuries. Researchers assessed healing using lameness grading and ultrasound at 2 weeks and 6 weeks post-treatment.
The results were remarkable: All horses showed significant improvements in ultrasound scores (indicating better tendon tissue quality) and reduced lameness. The therapy was safe (no complications) and led to progressive healing—horses regained normal tendon function at rest, trot, and even competition. The study also found a strong correlation between reduced lameness and improved tendon survival and tissue normality. For horse owners and trainers, this means high-power laser therapy offers a fast, effective way to treat tendon injuries and get horses back to peak performance.
Who Can Benefit from Laser Therapy for Tendinopathy?
Laser therapy is a versatile treatment that can benefit a wide range of individuals (and animals) with tendinopathy, including:
- Athletes: From runners with Achilles tendinopathy to tennis players with elbow tendinopathy (tennis elbow), laser therapy accelerates healing and reduces downtime.
- Office Workers & Manual Laborers: Those with repetitive strain injuries (like shoulder or wrist tendinopathy) can find relief without taking time off work.
- Older Adults: Age-related tendon degeneration often leads to chronic pain—laser therapy offers a gentle, non-invasive option to improve mobility.
- Horse Owners & Trainers: Sport horses with tendon injuries can recover faster and return to competition with high-power laser therapy.
Is Laser Therapy Right for You (or Your Horse)?
While laser therapy has proven effective in multiple studies, it’s important to consult with a healthcare provider (or veterinary professional for animals) to determine if it’s the right treatment for your specific condition. Factors like the severity of the injury, location of the tendon, and overall health will influence the type of laser therapy (low-level vs. high-power) and treatment duration.
One of the biggest advantages of laser therapy is its safety profile: Unlike surgery, it has no recovery time or risk of infection, and unlike long-term medication use, it has no side effects. For many patients, it’s a complementary treatment that works alongside physical therapy or rest to enhance healing.
The Future of Tendinopathy Treatment: Laser Therapy Leads the Way
As research continues to evolve, laser therapy is solidifying its place as a first-line treatment for tendinopathy. From low-level lasers for mild to moderate injuries to high-power lasers for severe cases (including equine injuries), this technology offers a targeted, evidence-based solution to one of the most common musculoskeletal conditions.
If you’re tired of living with tendinopathy pain or watching your horse struggle with tendon injuries, laser therapy may be the answer you’ve been looking for. With studies dating back decades and modern research confirming its efficacy, it’s time to embrace this innovative approach to healing.
References
- Nogueira Jr, A. C., & Moura Júnior, M. J. (2015). The effects of laser treatment in tendinopathy: a systematic review. Acta Ortop Bras, 23(1), 47-49. https://doi.org/10.1590/1413-78522015230100513
- England, S., Farrell, A. J., Coppock, J. S., Struthers, G., & Bacon, P. A. (1989). Low power laser therapy of shoulder tendonitis. Scand J Rheumatol, 18(6), 427-431. https://doi.org/10.3109/03009748909102106
- Jaafar, S. E., Al-Bayti, A. A. H., & Abdullah, S. I. (2021). Using Short Term of High Power Laser Therapy in Horse’s Tendon Injuries. Arch Razi Inst, 76(5), 1437-1444. https://doi.org/10.22092/ari.2021.356105.1779