Questions 62 to 66 are based on the following passage.
Yoga induces a feeling of well-being in healthy people, and can reverse the clinical and biochemical changes associated with metabolic syndrome, according to results of studies from Sweden and India. Metabolic syndrome is a cluster of heart disease risk factors such as high blood pressure, obesity and high blood sugar.
Dr. R.P. Agrawal, of the SP Medical College, Bikaner, India, and colleagues evaluated the beneficial effects of yoga and meditation in 101 adults with features of metabolic syndrome. In the study, 55 adults received three months of regular yoga including standard postures and Raja Yoga,while the remaining received standard care.
Waist circumference, blood pressure, blood sugar, and triglyceri HDL cholesterol levels were higher in the yoga group as compared joumal Diabetes REsearch and Clinicat Practice.
In the second study, published online December 19 in BioMed Central Complementary and Alternative Medicine, Dr. Anette Kjellgren from the University of Karlstad, Sweden and colleagues evaluated the beneficial effects of yoga-like breathing exercises on healthy volunteers.
55 adults were advised to practice "Sudarshan Kriya," which involves cycles of slow, normal and rapid breathing exercises. The exercises were practiced for an hour daily, six days a week for six weeks, while 48 controls were advised to relax in an armchair for I 5 minutes daily.
At the end of the study period, feelings of anxiety, stress and depression were significantly lower and levels of optimism significantly higher in the yoga group compared to the control group, Kjellgren and colleagues report.
Yoga induces a "relaxation response" associated with reduced nervous system activity and a feeling of well-being probably due to an increase in antioxidants(抗氧化剂) and lower levels of the stress hormone cortisol(应激激素皮质醇 ), they suggest.
Yoga not only helps in prevention of lifestyle. diseases, but can also be "a powerful adjunct therapy when these diseases anse,” co-investigator Dr. Faahri Saatiglou, from the University of Oslo, told Reuters Health. "We do not emphasize this point enough in our Westem health care."
The studies of yoga from Sweden and India have shown that __
A. yoga will make patients recover more quickly
B. yoga can cure cancer gradually
C. yoga will lead the state of being healthy
D. yoga can keep people optimistic
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