The Invisible Heat: Understanding the Difference Between Near-Infrared and Far-Infrared Rays
We love infrared saunas and are excited to see that they have become increasingly popular as a way to relax, physically recover and detoxify the body. These saunas use infrared radiation to heat the body directly, unlike traditional saunas that use steam or dry heat to heat the air around the body. While there are different types of infrared radiation, most infrared saunas use either near-infrared or far-infrared radiation to achieve their therapeutic effects. Let’s explore the difference between near-infrared and far-infrared radiation and discuss how they are used in infrared saunas for various health benefits.
Infrared radiation is a type of electromagnetic radiation that is invisible to the human eye but can be detected as heat. It is divided into three categories: near-infrared (NIR), mid-infrared (MIR), and far-infrared (FIR), depending on their wavelengths.
Near-infrared radiation (NIR) has wavelengths between 750 and 1,400 nanometers (nm), which is just beyond the visible spectrum of light. It is commonly used in medical imaging, remote sensing, and optical communication. In contrast, far-infrared radiation (FIR) has wavelengths between 3,000 and 10,000 nm, which are longer than those of NIR. FIR is emitted by warm objects, such as the human body and the sun, and can be detected as heat.
One significant difference between NIR and FIR is their penetration depth into the human body. NIR radiation can penetrate only a few millimeters into the skin, whereas FIR radiation can penetrate several centimeters. This property makes FIR radiation useful in medical treatments, such as promoting tissue regeneration and reducing inflammation. NIR radiation is also used in some medical treatments, such as photobiomodulation therapy, which uses low-level laser therapy to improve tissue healing and reduce pain.
However, there are safety concerns associated with NIR radiation, particularly with regard to eye safety. NIR radiation can damage the retina and cause cataracts, which are cloudy areas in the eye's lens that can impair vision. Prolonged exposure to high levels of NIR radiation can also cause skin damage, such as sunburn and skin cancer.
Another concern related to NIR radiation is electromagnetic field (EMF) exposure. EMF is a type of radiation that is emitted by electrical devices, such as smartphones, Wi-Fi routers, and power lines. While NIR radiation is not classified as ionizing radiation, which can cause cellular damage, it can still cause biological effects, particularly in sensitive individuals.
Some of the potential health effects of EMF exposure include headaches, fatigue, dizziness, and sleep disturbances. Studies have also linked EMF exposure to an increased risk of certain cancers, such as leukemia and brain cancer, although the evidence is not conclusive. We say better safe than sorry, so we went with High Tech Health Saunas, which use Far-Infrared rays and have EMF protection.
NIR and FIR radiation differ in their wavelengths and penetration depth into the human body. While both types of radiation have medical applications, NIR radiation poses safety concerns related to eye and skin damage, as well as EMF exposure. It is important to be aware of these potential risks and take appropriate precautions, such as limiting exposure to high levels of NIR radiation and minimizing EMF exposure from electrical devices. When it comes to infrared saunas, it's important to note that many companies use near-infrared radiation because it can release higher heat and is cheaper to produce. However, this can be to the detriment of the consumer, as near-infrared radiation can pose safety risks if not used properly. It's important to do your research before purchasing an infrared sauna to ensure that it uses safe levels of radiation and is made by a reputable company. Always consult with a healthcare professional before using an infrared sauna or any other type of therapy, especially if you have any underlying health conditions. By being informed and cautious, you can safely enjoy the many benefits of infrared therapy.
