Tendons and ligaments are built for strength — but they’re slow to heal.
Whether it’s Achilles tendinopathy, patellar tendon pain, rotator cuff strain or a ligament sprain, these connective tissues have limited blood supply and slow cellular turnover. That’s why recovery can feel frustratingly long.
In 2026, growing research into photobiomodulation (PBM) — also known as low-level laser therapy — is highlighting a promising area:
Collagen remodelling and fibroblast activation.
Why Tendons & Ligaments Struggle to Recover
Tendons connect muscle to bone.
Ligaments connect bone to bone.
Both are made largely of type I collagen, arranged in highly organised fibre bundles.
When overloaded through sport, work or repetitive strain, microtears develop. The body attempts repair, but without optimal collagen remodelling, tissue may heal in a disorganised way — contributing to:
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Chronic tendinopathy
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Reduced elasticity
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Ongoing stiffness
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Increased reinjury risk
The key isn’t just pain relief.
It’s improving tissue quality.
The 2024 Research on Tendon Healing
A recent study published in Springer Nature’s journal Lasers in Medical Science (2024) explored how photobiomodulation influences tendon repair processes.
The findings reinforce earlier work published in:
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Photobiomodulation Photomedicine and Laser Surgery
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The American Journal of Sports Medicine
Emerging evidence suggests PBM may:
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Stimulate fibroblast proliferation
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Enhance collagen synthesis
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Improve collagen fibre organisation
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Modulate inflammatory mediators
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Support angiogenesis (new blood vessel formation)
These mechanisms directly relate to tendon resilience, not just symptom management.
Fibroblasts: The Unsung Heroes of Repair
Fibroblasts are the primary cells responsible for producing collagen.
When activated appropriately, they:
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Lay down new extracellular matrix
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Organise collagen fibres along lines of stress
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Support tensile strength recovery
Photobiomodulation works at the mitochondrial level — increasing ATP production within cells. When fibroblasts have greater energy availability, their capacity for repair activity improves.
This is why PBM is being explored not simply as a pain tool, but as a regenerative support modality.
Collagen Remodelling: Why Structure Matters
Pain reduction alone does not equal healing.
Many people feel concerned that if pain drops quickly, the tissue might not actually be stronger.
That’s a fair concern.
The goal with tendon rehabilitation is controlled loading combined with biological support. PBM may assist by:
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Regulating excessive inflammation
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Supporting organised collagen alignment
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Enhancing the transition from early repair to remodelling phase
When combined with progressive strength training, this creates an environment for more durable healing.
From Acute Injury to Chronic Tendinopathy
In early-stage injury, inflammation dominates.
In chronic tendinopathy, degeneration and collagen disorganisation are more common.
Photobiomodulation appears to influence both phases:
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In acute cases, it may help regulate inflammatory signalling.
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In chronic cases, it may support cellular activity and matrix repair.
That dual action makes it appealing in sports medicine and physiotherapy settings across Australia.
Addressing the Scepticism
Some clinicians question whether light penetration is sufficient to influence deeper tendon structures.
It’s a valid question.
Modern pulsed laser systems use specific red and near-infrared wavelengths designed for tissue penetration. Research indicates that correct power density and pulsing parameters are critical for biological effect.
In other words, precision matters.
Why Pulsed Low-Level Laser Therapy Is Important
Devices designed for therapeutic use — such as the clinically aligned pulsed system available here:
👉 https://pulselaserrelief.com.au/products/pulsed-low-level-laser-therapy
are built to deliver wavelengths studied in peer-reviewed literature.
Pulsed delivery may:
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Improve depth of tissue interaction
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Enhance cellular signalling
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Support collagen remodelling processes
For individuals managing tendon pain, integrating PBM alongside structured loading programs may offer a more comprehensive recovery strategy.
The Bigger Picture: Building Resilient Connective Tissue
Tendon and ligament injuries are rarely just about one bad movement. They’re often about cumulative load exceeding tissue capacity.
Resilience depends on:
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Organised collagen structure
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Healthy fibroblast activity
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Balanced inflammation
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Progressive mechanical loading
Photobiomodulation doesn’t replace rehabilitation.
It may support it at a cellular level.
And in modern recovery science, that’s where the real shift is happening — not just reducing pain, but improving tissue quality.
For athletes, active Australians and anyone dealing with stubborn tendon issues, the future of healing may lie in supporting the biology of repair — starting with light.
References:
Cárdenas-Sandoval, R.P., Bernal-Bernal, L., Cabrera-Salazar, S. et al. In-vitro study on type I collagen synthesis in low-level laser therapy on the early ligament fibroblasts’ healing process. Lasers Med Sci 39, 225 (2024). https://doi.org/10.1007/s10103-024-04151-7
