If you've searched for cold laser therapy or shockwave therapy, you've probably run into the same wall we see patients run into constantly: pages full of manufacturer claims, no independent research cited, and language vague enough to make you wonder if it's marketing dressed up as medicine.
That skepticism is reasonable. Both technologies have been oversold by some providers, under-explained by most, and lumped together in ways that make it hard to tell what they actually do, what they don't, and whether either one applies to your specific problem.
So here's a straight answer, without the hype: both modalities have a real, published research base — but it's narrower and more specific than most marketing suggests, and knowing what that research actually covers is the difference between a therapy that helps and one that's just an expensive add-on to your visit.
What Cold Laser Therapy Actually Is
"Cold laser" is the common name for low-level laser therapy (LLLT) — a class of devices that use specific wavelengths of light to stimulate cellular activity in tissue without producing heat, unlike surgical or cosmetic lasers.
There's an important technical distinction inside "cold laser" that most patient-facing content skips entirely: laser devices are FDA-classified by power output, Class 2 through Class 4, and that classification determines both how the device is used and what the research behind it actually says.
At Breathe, we use the Erchonia EVRL — a Class 2 low-level laser. Erchonia has built its entire product line around Class 2 technology and holds the largest body of independent, peer-reviewed research of any laser therapy manufacturer, including several FDA clearances specifically tied to published clinical trials. We'll cover the practical difference between Class 2 and Class 4 devices — and why we chose Class 2 — in the next post in this series.
The mechanism, at a research level: low-level laser light is absorbed by mitochondria in the target tissue, which increases ATP production (the cell's energy currency) and has been shown in controlled studies to reduce inflammatory markers and modulate pain signaling at the cellular level. This is sometimes called photobiomodulation in the research literature.
What Shockwave Therapy Actually Is
Shockwave therapy is a mechanically different technology — it uses acoustic pressure waves, not light, delivered through the skin to the target tissue. The waves are thought to work through mechanotransduction: the mechanical energy triggers a controlled micro-inflammatory response, which stimulates the body's own repair processes in tissue that has stalled in a chronic, under-healed state.
This is a meaningful distinction from cold laser. Shockwave is generally better researched for specific chronic tendon and fascia conditions — plantar fasciitis being the most heavily studied — where the mechanical stimulus to trigger renewed healing is the more relevant tool than the cellular-level anti-inflammatory effect of laser.
What the Research Actually Supports — and What It Doesn't
Independent, peer-reviewed research on low-level laser therapy is strongest for: musculoskeletal pain reduction in conditions like tendinopathy and osteoarthritis, wound healing acceleration, and reduction of inflammatory markers in soft tissue injury. It is not well supported as a standalone treatment for structural problems like disc herniation or as a substitute for addressing the underlying joint mechanics driving a condition — which is why we use it as one tool within a broader care plan, not a stand-alone fix.
Research on shockwave therapy is strongest for chronic plantar fasciitis (the most heavily studied application, with multiple systematic reviews showing meaningful improvement, particularly in cases that haven't responded to more conservative care), calcific tendinopathy of the shoulder, and chronic tennis elbow. It is less established for acute injuries or general non-specific pain.
Neither technology is a replacement for addressing why a joint or tissue is under sustained strain in the first place. That's the piece most marketing skips: laser and shockwave both do real, published, mechanistically sound things at the tissue level — but tissue that keeps re-injuring because of an unaddressed joint restriction or movement compensation will keep re-injuring regardless of how much laser or shockwave is applied to it. This is why we combine both technologies with the gentle chiropractic care that addresses the mechanical root cause.
How We Decide Which Patients Are a Good Fit
Not every condition responds equally well to either technology, and part of a good evaluation is being honest about which patients are genuinely likely to benefit versus which need a different approach first. Over the next several posts in this series, we'll go condition by condition — plantar fasciitis, shoulder pain, and chronic back pain — and walk through what the research actually shows for each one, so you can make an informed decision rather than relying on marketing claims.
If you're dealing with a long-standing issue that hasn't responded to more conservative approaches, book a first visit at Breathe Chiropractic in Phoenix, and we'll give you a straight assessment of whether laser, shockwave, chiropractic care, or some combination is the right fit for what's actually going on.
Dr. Carla Freeman, DC | Breathe Chiropractic | Phoenix AZ | (602) 254-2454
.jpg)
.png)
