近年来，在国外流行着一种“热瑜伽”（hot yoga），后者是指在一个将温度设定于华氏90～105度（相当于摄氏32～40度左右）的房间或环境中练习瑜伽（Doing yoga in a room heated to between 90 and 105 degrees）。热瑜伽之所以流行，是因为它确有某些保健功效，但并非每个人都适合于参与。例如，血压偏高或偏低者，心脏病患者和/或患有关节与肌肉等方面的毛病者都应慎重参加热瑜伽练习。考虑到国内流行的桑拿温度比上面提到的热瑜伽设定的温度还要高，在此本人提醒大家在去桑拿前最好检查一下自己的身体，看看是否可以承受如此高温的冲击？更多资讯，请参阅全文。

Avoid Getting Scorched by 'Hot Yoga'

High temperature could be dangerous for people with certain medical conditions, expert cautions

SUNDAY, Jan. 22 (HealthDay News) -- Doing yoga in a room heated to between 90 and 105 degrees -- known as "hot yoga" -- is increasing in popularity, but it may not be for everyone, an expert warns.

Exertion in high temperatures may be dangerous for people with certain health conditions, said Diana Zotos, a yoga instructor and physical therapist in the rehabilitation department at the Hospital for Special Surgery in New York City.

"If you have sensitivity to heat, if you've ever had heat stroke or tend to get fatigued, dizzy or dehydrated quickly, you should ask your doctor before starting hot yoga," cautioned Zotos in a hospital news release. "Anyone with osteoarthritis, any rheumatologic arthritis, pain in muscles or a joint, or any kind of previous injury should check with their doctor."

Zotos added that anyone with high blood pressure, low blood pressure or heart disease should consult a cardiologist before trying hot yoga.

Even if they don't have an underlying condition, beginners, particularly those older than 40, should take precautions before trying hot yoga.

"Yoga of any type is physically challenging, and the heated environment of hot yoga makes the practice especially demanding," Zotos said. "The heat makes people feel as if they can stretch deeper into poses and can give them a false sense of flexibility. This can lead to muscle strains or damage to the joint, including ligaments and cartilage."

Zotos recommended that anyone new to hot yoga become familiar with the 26 poses used in the classes before they start.

"The heat factor also puts more strain on the heart and challenges endurance.

That being said, people should be of good cardiovascular health; have healthy hip, knee, spine and shoulder joints; shouldn't have balance or neurological issues; and should have a general tolerance for excessive heat," she noted. Zotos also offered the following hot yoga tips for beginners:

Bring a mat, a towel and, if possible, a friend.

Wear shorts and a tank top.

Drink plenty of fluids well before class (no coffee or soda).

Do not consume more than 200 calories two to three hours before class.

Research the yoga studio and make sure the hot yoga teacher has the proper certification and experience.

Arrive early to meet the instructor, get settled and adjust to the temperature.

    Start slowly. Do not try poses that are too advanced and do not hold poses beyond what is

 comfortable or to the point of pain.

Take breaks when needed.

Don't get discouraged if you can't reach a pose.

If necessary, ask questions about how to perform certain poses.

Stop at the first sign of dizziness, chest pain or feeling faint or overheated. Seek medical assistance if necessary.

SOURCE: Hospital for Special Surgery, news release, Jan. 16, 2012