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Within typical LLLT and PBM (non-thermal) parameters, it is often recommended to use the skin contact method for deep tissue treatments. For superficial applications the non-contact method (using devices at a distance) is allowed.  The Phototherapy textbook by Tuner and Hode recommends non-contact for what they call "shallow problems", and for "deeper problems" to use skin contact method with some pressure. [1, Tuner&Hode, pg 118] "At medium depth: Press the probe into skin. The deeper tissue to be treated, the higher the pressure." [1, Tuner&Hode, pg118] One article makes this statement in a more technical way: "Increased light transmission was found to correlate with...

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A long time ago - researchers and doctors would discuss the optimal intensity as being a low intensity that has been proven to deliver consistent results. Many are still talking like this today. In the commercial industry, the "the highest intensity" marketing is often hinged on claims that you (1) get faster treatment times and (2) get better penetration. To the extreme point that it seems people are scorching themselves with reckless levels of intensity for fears they would not get adequate penetration otherwise. Yet the research and experts often contradict these points. Exposure time is often cited as being...

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 A type of Radiant Heat Therapy is called Water Filtered IRA (wIRA). It uses a broad spectrum Near-Infrared halogen incandescent emitter with mostly non-thermal NIR wavelengths (thanks to the water filter). Typical intensities of wIRA are 80-160 mW/cm^2 delivered in a large area with mostly Red and NIR wavelengths. [1] This intensity range should be recognizable, as it is similar to the range we are currently seeing in many "highest intensity" LED red light therapy panels, that we affectionately call more appropriately as LED Heat Lamps. The wIRA therapy attributes the benefits to both thermal and non-thermal mechanisms.[1] However, despite...

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There is a new form of light therapy that has been recently invented in the past couple of years. It is called LED Heat Lamp Therapy, which uses high-intensity Red & NIR LED panels for therapeutic heating and photonic energy delivery. These are no longer true Red Light Therapy as that follows the non-thermal light therapy sciences of Low Level Light Therapy and Photobiomodulation. As we discuss in great detail in a previous blog. As is the basic definition described in most studies: "Instead of utilizing heat, PBM harnesses the photochemical conversion potential of low-intensity near-infrared (FR/NIR) light within the...

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Studies including people with darker skin types are often lacking in Photobiomodulation and LLLT literature. The published dosing guidelines by the World Association for Laser Therapy (WALT) are noted to be for Caucasian skin types: "Recommended doses are for white/caucasian skin types based on results from clinical trials or extrapolation of study results with similar pathology and ultrasonographic tissue measurements." https://waltpbm.org/documentation-links/recommendations/ While many studies acknowledge the potential impact of skin color on Photobiomodulation dosing and effects, it has not been thoroughly investigated yet. A recent 2024 article notes that they believe they are the first to investigate the use of...

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