EXERCISE:
During a 10-20 minute sauna session, your heart rate increases by 50-75%. This provides the same metabolic result as physical exercise. The increased cardiac load is the equivalent to a brisk walk. There is a nominal effect on blood pressure because the heat also causes blood vessels in skin to expand to accommodate increased blood flow.

The Journal of the American Medical Association (JAMA) (August 7, 1981) reported what is common knowledge today: Many people who run do so to place a demand on their cardiovascular system as well as to build muscle. What isn’t well known is that it also reported the “regular use of a sauna may impart a similar stress on the cardiovascular system, and its regular use may be as effective as a means of cardiovascular conditioning and burning of calories as regular exercise.”

DETOXIFICATION:
Toxins such as sodium, alcohol, nicotine, cholesterol and carcinogenic heavy metals (cadmium, lead, zinc, nickel) accumulate in the body during modern daily life. The body eliminates most toxins naturally by sweating. Heat therapy stimulates the sweat glands that cleanse and detoxify the skin. The heat simply speeds up the body’s natural process.

INDUCED FEVER:
Most illnesses are accompanied by a fever. During a fever, the body heats up to eliminate viruses and attack foreign agents. Often misunderstood, this rise in temperature is a natural stage of the immune system’s healing process and is one of the best ways to rid the body of chemicals and unwelcome visitors. The immune system weakens the hold of viruses and bacterial growth. Saunas induce an “artificial fever” by heating up the body but without the pains of an illness.

Subsequently, the body wards off invading organisms much more easily because the immune system is activated consistently by the “artificial fever”.

REDUCE STRESS:
Heat therapy loosens the muscles and relaxes the body. Many massage therapists use heat to provide more thorough and effective treatment.

BENEFIT TO SKIN:
Heat improves circulation, expels dirt & chemicals and removes dead cells on the surface of the skin. This leads to a more soft and clear complexion.

For more information, visit saunafin.com.

A sauna used to be thought of as a luxury. But studies now confirm that diet and environmental chemicals cause 95% of cancers.

Furthermore, as the first generation of man exposed to such an unprecedented plethora of daily chemicals, we have learned that stored or undetoxified chemicals can mimic any disease.

‘Incurable’ chronic diseases that were thought to have no known cause often disappear once toxic chemicals are gone. Since the far infrared sauna is the safest, most efficacious and economical way of depurating stored toxins, this makes it a household necessity.

For more information, visit saunafin.com.

Saunas and steam baths are very powerful ways to drive toxins out of your body. Research has even shown that saunas can remove pesticides and heavy metals from the body.

Some people notice a chemical smell on their body when they have a sauna.

Unlike Finland, where just about every home has a sauna, in this country you will probably have to rely on gyms and health spas. Make sure your drink plenty of water before and after having a sauna or steam bath, because you will lose a lot of water in the process.

For more information, visit saunafin.com.

Nowhere has the Korean longing to lie on a heated floor (a feature of traditional houses) and eat one’s fill found fuller expression than in the jjimjilbang, the 24-hours-a-day public bathhouse.

But calling the jjimjilbang a bathhouse hardly begins to describe its attractions.

The jjimjilbang is modeled on the public bathhouses that were popularized early last century by the country’s Japanese occupiers but eventually fell out of favor when showers became a standard feature of Korean homes. In their modern incarnation, the bathhouses are a reflection of South Korea’s relatively newfound wealth, but also a way to satisfy nostalgia.

Koreans often say they are drawn to a jjimjilbang because they miss the ondol, the heated floor most families slept on until they began moving to high-rise apartments and Western-style beds. The floor is enough of a draw that some families occasionally spend the night in the bathhouse’s common rooms.

The communal nature of the jjimjilbang also suits many South Koreans; until recent decades, most people lived with their extended families.

The first public bathhouse was built here in 1925, mostly to cater to Japanese colonialists, but the institution quickly became part of Korean social life. Most urban neighborhoods had a bathhouse, as did small towns. Inside, patrons sat in or around large, sex-segregated baths filled with extremely hot water, gossiping and scooping water on themselves with gourds. Scrubbing other bathers’ backs, even strangers’, was common practice.

Many Korean adults share a childhood memory of being taken to public baths for no-nonsense, sometimes tears-inducing scrubs by their mothers. The bathhouses began adding amenities in recent decades as more people bathed at home. Those included steam rooms and professional body scrubbers, barbershops and hair salons, and communal sleeping rooms, where harried business people — often expected to work long hours and stay out late drinking with colleagues — could come during the day for a nap on a heated floor.

By the late 1990s, many bathhouses had turned into true recreation complexes, and going to one became as much a part of Korean social life as going to the movies. In 2006, there were more than 13,000 in the country, more than 2,500 of them in Seoul. Some can accommodate thousands of people.

Because they are open around the clock and are relatively inexpensive, the complexes have attracted budget-minded travelers, who stay in the communal sleeping room. Recently the government banned minors without adult escorts from jjimjilbang from 10 p.m. to 5 a.m., after reports that the sites were becoming havens for runaways.

At the front counter, customers pay about 8,000 won, or $7, pick up their top and shorts and a towel and enter the sex-segregated bath halls. There, for an extra fee, they can be scrubbed by a professional using exfoliating mitts.

A jjimjilbang’s reputation owes much to its saunas.

Some feature heated huts suffused with the aroma of mugwort (important in traditional medicine). Sometimes the walls are studded with jade and amethyst, which many Koreans believe emit healing rays when heated.

Chun Byung-soo, who opened World Cup Spaland five years ago at Seoul’s World Cup soccer stadium, said the pioneers of jjimjilbang were inspired by the ancient Korean custom of sitting in giant charcoal or pottery kilns for heat therapy. Many Koreans believe heat can help cure some illnesses.

For more information,visit topics.nytimes.com.