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Traditional saunas (e.g. Finnish saunas), far infrared saunas, and near infrared saunas all provide the level of heat necessary for an effective thermal healing environment. Heat acclimation through sauna use can promote physiological adaptations that result in increased endurance, easier acquisition of muscle mass, and a general increased capacity for stress tolerance. Deliberately acclimating yourself to heat, independent of working out, can be defined as “hyperthermic conditioning.” Saunas raise the core body temperature resulting in many beneficial health effects. There are positive effects of heat acclimation on the brain, including the growth of new brain cells, improvement in focus, learning and memory, and ameliorating depression and anxiety. Modulation of core temperature might even be largely responsible for “runner’s high” via an interaction between the dynorphin/beta-endorphin opioid systems. Hyperthermic Conditioning results in a sweat response leading to detoxification and sauna use, leads to stress relief and relaxation promoting a parasympathetic response.
Hyperthermic Conditioning or heat therapy occurs in all saunas and accounts for the performance enhancing changes described in the above article and other similar articles.
Exercise particularly intense or extreme exercise increases body temperature. Exercise also often occurs in a setting of high ambient temperature making heat stress injury (heat stroke) more likely. The exercise induced sweat response is not very effective for detoxification and exercise generally occurs in a state of sympathetic nervous system activation.There is, however, a marked interest among a great many people to increase athletic performance and endurance.
Human growth hormone (HGH) levels drop dramatically as we age, worsening the aging process and associated muscle loss.
Maintaining HGH levels is critical to prevent muscle atrophy and muscle loss associated with aging. Sauna use along
with exercise can help slow down
the aging process and also promotes the release of BDNF (Brain Derived Neurotrophic Factor) important for
brain health. 7
Healthy levels of heat stress encountered in the sauna induce the production of heat shock proteins (HSPs). When cells
in our bodies are exposed to heat stress DNA separation leads to HSP synthesis. "Heat shock proteins (HSPs) chaperone other cellular proteins, guarding them from
going astray, folding improperly or misassembling while forming larger aggregates". 8 HSPs help
prevent and repair damaged proteins promoting muscle growth. HSPs eliminate free radicals and maintain healthy
glutathione levels supporting intracellular antioxidant capability.
Animal studies suggest that marked muscle regrowth may occur when subjects are exposed to heat stress. Sauna use
dramatically slows muscle atrophy during disuse after muscle injury and immobilization. Animal studies demonstrate a 30% increase in muscle regrowth after immobilization. 9 In our drug driven society the use of prescription medications is at an all-time high.
Cholesterol-lowering statin drugs are widely used. One side effect of their use is rhabdomyolysis, a very serious
degenerative muscle disorder that results in profound muscle loss. Heat shock proteins help protect against this complication. 10
study widely reported in the media examined Finnish men over 20+ year period demonstrating a significant increase
in longevity as well as a profound decrease in fatal cardiac and other fatal vascular events. 11Animal
studies suggest that HSP’s may be directly involved in these fantastic benefits of sauna use.
Hyperthermic (“sauna”) conditioning may indirectly improve athletic performance by improving insulin sensitivity. At
least one animal study found that hyperthermic treatment decreased insulin levels. 12 Insulin not only
controls glucose homeostasis but affects protein metabolism too. Improving insulin sensitivity tends to decrease muscle
catabolism and increase muscle synthesis. There are implications here for not only muscle performance but for Type 2
Diabetes and Metabolic Syndrome as well.
Sauna use (hyperthermic conditioning or therapy) helps to reset the balance between new protein synthesis and protein
degradation to a state of net protein synthesis. Sauna therapy acts synergistically to increase muscle growth with heat
shock proteins (HSPs) slowing and preventing muscle protein degradation. Sauna use acts to increase muscle growth by
Heat Shock Proteins (HSPs)
Marked increase in Growth Hormone production (HGH)
Improved Insulin Sensitivity
Many of the changes that proceed from Sauna use benefit both the musculoskeletal system and the brain and nervous
system. Sauna use will benefit not only for those seeking to increase athletic performance but cognitive performance as
activating stem cells to produce more brain tissue. BNDF helps protect the motor side of the nervous system from age
related atrophy and induces the production of multiple other beneficial chemicals. Heat stress is also implicated in
increasing brain focus and attention levels. Myelin growth may be promoted. Myelin is the key component of the sheath
surrounding neuronal cells. Heat stress also boosts endorphin release.
Phototherapy or Light Therapy (includes Color Therapy)
“Mitochondria are thought to be a likely site for the initial effects of light, leading to increased ATP
production, modulation of reactive oxygen species and induction of transcription factors. These effects in turn lead
to increased cell proliferation and migration (particularly by fibroblasts), modulation in levels of cytokines, growth
factors and inflammatory mediators, and increased tissue oxygenation.” 16
Principal tissue chromophores such as hemoglobin and melanin absorb light below 600 nm and water (H2O) begins to absorb
incoming light above 1150nm. There is an optical window of reduced absorption in human tissue between 600 nm and 1150nm
where penetration is maximized. 17
For light to be beneficial to our bodies the light has to penetrate our tissue and the penetrating light has to be utilized by some chromophore or other light sensitive system. Only near infrared light meets these criteria. Virtually all studies of Low Level Light Therapy (LLLT) utilize near infrared (NIR) light because the key systems in our bodies that are affected by light do not absorb far infrared light. Mitochondrial ATP pathways, including Cytochrome-C-oxidase, and other critical cell processes involving ATP production and cell signaling absorb only NIR light.
Healing or other beneficial sauna effects ascribed by some to far infrared light likely arise either from the thermal effects (hyperthermic therapy) of sauna use or the inclusion of NIR light in their emission spectra. Claims that mid or far infrared light has specific beneficial photo-biological effects become difficult to support on a scientific basis. Far infrared light does not penetrate enough to reach deeper tissues and, quite simply, there are no biologic receptors to use FIR light.
Direct Metabolism Boost
This effect cannot be overstated. Everything works better when oxidative phosphorylation (ATP production) improves. Mitochondria ramp up ATP production when excited with NIR light.
Brain and other Nervous System Effects
The above illustration also demonstrates effects on the nervous system by Low Level Near Infrared Light. NIR light is
absorbed by Cytochrome oxidase, the terminal enzyme in the mitochondrial respiratory chain. Cytochrome oxidase has a
key role in neuronal physiology, as it serves as an interface between the oxidative energy metabolism and cell survival
signaling pathways. Cytochrome oxidase is an ideal target for cognitive enhancement, as its expression reflects the
changes in metabolic capacity underlying higher-order brain functions. This is a photochemical mechanism for
cognitive-enhancing and brain-stimulatory effects in animal models and humans. NIR light directly provides neuroprotection and cognitive enhancement by
facilitating mitochondrial respiration, with hormetic dose–response effects and brain region activational
These effects are independent of beneficial effects to the brain by hyperthermic conditioning.
Body Fat & Help Control Focal Cellulite
While not directly involved with performance enhancement concern about body fat and cellulite is almost universal. NIR
light works synergistically with exercise to increase weight loss. This study group lost 444% more body weight by combining NIR light therapy with exercise than the
control group doing exercise only. 21
using NIR phototherapy alone and in combination with other modalities have demonstrated decreases in cellulite accumulation. 2223
Multiple studies show accelerated healing of wounds and other types of tissue injury using NIR light. A
great example is the use of NIR light therapy to treat disorders and injury to the eyes. 25 Rather than causing injury to the eye, near infrared light helps the eyes heal. In a
scientific study, mice were blinded by chemical injury (methanol) and the blindness was reversed with the application of NIR light therapy. 26 There is a growing body of evidence demonstrating the powerful healing effects of
NIR light. NIR light promotes faster cell regeneration and human tissue growth.
NIR light leads to the release of nitric oxide stimulating vasodilation of the microcirculatory system bringing more blood supply to muscles.
Better Endurance and muscle healing. NIR light exposure alone reduces muscle fatigue. NIR light accelerates healing of muscle and other tissue injury. Endurance capability is improved. Inflammation associated with muscle and joint disorders is diminished.
The deeply penetrating near infrared light helps unlock even hard to get toxins. The rapid and profound sweating
response that takes place in the relaxed atmosphere of a near infrared sauna under parasympathetic nervous system
control ("rest & digest" not "flight or fight") combines with NIR phototherapy to produce marked detoxification. 29
Near infrared light stimulates vital collagen and elastin production. Collagen helps plump the skin, while elastin
firms the skin. The visible red and NIR light energizes and repairs damaged cells, stimulating collagen and elastin and
returning the skin to a more youthful look. NIR light is being used currently to treat specific skin problems such as psoriasis, acne scars, eczema, rosacea and