Red (660 nm) and near-infrared (850 nm) light are both capable of alleviating musculoskeletal pain by enhancing mitochondrial function, improving microcirculation, and suppressing inflammation. The 660 nm wavelength primarily affects superficial tissues, whereas the 850 nm wavelength penetrates more deeply into muscles and joints.

What 660 nm does for MSK pain

660 nm penetrates a few millimeters into tissue (roughly the dermis and superficial fascia), increasing ATP production, improving local blood flow, and modulating inflammatory mediators.

In studies involving animals and humans using low-level light or LED therapy around 660 nm, muscle irradiation has been shown to decrease markers indicative of muscle damage and to enhance recovery following strain. Additionally, it has been observed to reduce localized myofascial and back pain in certain trials.

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