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Full-Spectrum Sauna

type of infrared sauna

Definition of Full-Spectrum Sauna

A sauna that has near, mid, and far-infrared light wavelengths.

Near-infrared is the shortest wavelength starting from 0.7μm to above 1μm while far-infrared is the longest wavelength at 3.0–100 μm.

Given the different wavelengths, they penetrate the body at different depths, with far-infrared penetrating the deepest—about 4 cm into the skin.

A full-spectrum sauna provides broader health benefits than a far-infrared sauna since it contains different wavelengths.

penetration of near-infrared rays in the epidermis at different wavelengths

From the image above, near-infrared rays (NIR) between 650 nm to 900 nm at a fluence rate of - 0.125 penetrated the skin to 0.1 cm.

However, they penetrated the skin at different depths at a fluence rate of - 0.432. Longer NIR wavelengths 900 nm penetrated the epidermis to about 0.75 cm while the shortest NIR maintained its depth at 0.1 cm.

penetration of near-infrared rays in fat and muscles

Near-infrared rays penetrate deeper in fat and muscle tissue compared to the epidermis.

At a fluence rate of - 0.125, NIR of wavelengths 650 nm, 775 nm, and 900 nm, the wavelengths penetrated fat and muscle tissue at 1 cm. This is compared to a penetration depth of 0.1 cm in the human epidermis.

The wavelengths maintained a similar depth at a fluence rate of - 0.432. Still, they penetrated the tissue to different depths at a fluence rate of - 1, with the longest wavelength—900 nm—penetrating the tissue the deepest.

Specifically, NIR light provides the following health benefits:

  • Promotes wound healing
  • Reduces inflammation or pain
  • Improves skin texture and firmness
  • Anti-aging benefits—reduces fine lines, wrinkles, and age spots
  • Promotes skin rejuvenation

On the other hand, mid-infrared light (MIR) improves learning and memory recall.

Example of “Full-Spectrum Sauna” in a sentence

The full-spectrum sauna provides a wider range of health benefits than the far-infrared sauna.

Related Terms for Full-Spectrum Sauna