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WASHINGTON, Jan. 2 (Xinhua) -- A systematic review of previous studies suggests that there may be a positive connection between physical activity and children's academic performance, according to a report published Monday in the Archives of Pediatrics & Adolescent Medicine.A group of scientists at the Vrije Universiteit (Free University) Medical Center in the Netherlands reviewed evidence on the relationship between physical activity and academic performance because of concerns that pressure to improve test scores may often mean more instructional time for classroom subjects with less time for physical activity.The authors identified 10 observational and four interventional studies for review, 12 of which were done in the United States, one in Canada and one in South Africa. Sample sizes ranged from 53 to about 12,000 participants between the ages of eight years and 18 years old. Follow-up varied from eight weeks to more than five years."According to the best-evidence synthesis, we found strong evidence of a significant positive relationship between physical activity and academic performance. The findings of one high-quality intervention study and one high-quality observational study suggest that being more physically active is positively related to improved academic performance in children," the report said.Background information in the article suggests that exercise may help cognition by increasing blood and oxygen flow to the brain, increasing levels of norepinephrine and endorphin to decrease stress and improve mood, and increasing growth factors that help create new nerve cells and support synaptic plasticity."More high-quality studies are needed on the dose-response relationship between physical activity and academic performance and on the explanatory mechanisms, using reliable and valid measurement instruments to assess this relationship accurately," the report concluded.

HONOLULU, the United States, Nov. 12 (Xinhua) -- Chinese Commerce Minister Chen Deming has said that China-ASEAN Free Trade Area, launched at the beginning of last year, accords with the mutual interests of China and ten nations of the Association of Southeast Asian Nations (ASEAN) and brings advantage to both sides.Chen made the remarks during his meetings with Indonesian Trade Minister Gita Wirijawan and Thai Deputy Prime Minister and Commerce Minister Kittirat Na Ranong on Friday on the sidelines of the week-long Asia-Pacific Economic Cooperation (APEC) meetings held in Honolulu, Hawaii.According to information made available to Xinhua Saturday, Chen said in his meeting with Gita that China and Indonesia have witnessed a sound development of bilateral economic and trade relations. The China-ASEAN Free Trade Area has provided a new platform for the bilateral economic and trade cooperation, with more benefits and opportunities for enterprises from both countries.Chinese enterprises, especially those from the southern part of China, are keen to invest in Indonesia, said Chen, adding that China would like to discuss with Indonesia on creating areas similar to industrial parks so as to attract more Chinese enterprises and enterprises from other countries to invest in the Southeast Asian country.Gita said Indonesia will commit to the consensus reached between leaders of both countries to increase the volume of bilateral trade from current 34 billion U.S. dollars to 80 billion U.S. dollars in three or four years.He welcomed Chinese enterprises to invest in Indonesia, adding it will be conducive to the realization of the trade goal.Saying that the economies of Indonesia and China have been complimentary to each other, Gita expressed the will of comprehensive and long-term cooperation between both sides.During his meeting with Kittirat, Chen first expressed sympathy to the flood victims in the country, saying that China would like to offer assistance to the rescue and reconstruction efforts and strengthen cooperation in areas including infrastructure construction with Thailand.He said China and ASEAN nations should promote the substantial cooperation among member nations of the China-ASEAN free trade area, the largest free trade area in the world, improve infrastructure including highways, railroads, ports, telecommunication and electricity, so as to benefit the enterprises and people in the regions.China encourages enterprises to invest in the ASEAN nations and would like to conduct cooperation with enterprises from Thailand and other countries, Chen added.Kittirat, expressing his gratitude to China's help to the flood disaster, said that Thailand attaches great importance to the China-ASEAN Free Trade Area.Noting that Chinese enterprises are well-experienced in the construction of highways, railroads and bridges, he said Thailand welcomes Chinese enterprises to participate the construction and investment projects in these areas.

BEIJING, Otc. 26 (Xinhuanet) -- The more coffee people consume, the less likely they develop the most common form of skin cancer, a new study suggests, according to media reports Tuesday."Our study indicates that coffee consumption may be an important option to help prevent basal cell carcinoma," stated Fengju Song, lead researcher of the study and a postdoctoral fellow in the department of dermatology at Brigham and Women's Hospital and Harvard Medical School in Boston.Basal cell carcinoma (BCC) is reported to be a slow-growing form of skin cancer that accounts for 75 percent of all skin cancers. It is the most common type of skin cancer, with nearly one million new cases diagnosed each year in the United States.Although BCC is hardly fatal, if ignored, there may be consequences of treatment, including disfigurement, according to a USA Today report.The US researchers found that women who drank over three cups of coffee a day were 20 percent less likely to develop BCC, whereas the risk of having BCC for men who consumed more than three cups per day lowered 9 percent.To get the findings, the researchers analysed data from almost113,000 people between1984-2008 and over 23,000 were diagnosed with BCC.The researchers agreed that caffeinated coffee was associated with BCC risk reduction, but decaffeinated coffee did not have such effect.According to a Fox News report, besides cutting the risk of skin cancer, coffee consumption has also been found to lower the risk of breast cancer and prostate cancer and cancer overall."To the best of our knowledge, coffee consumption is a healthy habit," said Fengju Song, cited by the Fox News.The findings were presented Monday at the American Association for Cancer Research International Conference in Boston and not yet published in a scientific journal.

XI'AN, Nov. 20 (Xinhua) -- Fish in Hongjiannao Lake, China's largest desert freshwater lake, are teetering on the verge of extinction, according to local fishery authorities."The fish in Hongjiannao have nearly vanished," said Li Weiping, the head of a fish monitoring station in northwest China's Shaanxi province.As the lake continues to shrink, its water has become more salty and its pH reading has reached 9.6, while the maximum reading suitable for fish is 8.5, according to Li.The lake has gradually lost the water that it used to get from underground streams and rivers, Li said, adding that excessive coal mining around the lake has changed the way water flows underground. Two reservoirs have been built on two rivers near the upper reaches of the lake, preventing river water from flowing into the lake.The lake's water level has plunged by 20 to 30 centimeters every year. Its total surface area has been reduced to 41.8 square km, down from 67 km in 1996.

TOKYO, Jan. 24 (Xinhua) -- Japanese Foreign Minister Koichiro Gemba said Tuesday that Japan will seek to take a less inward- looking stance when it comes to diplomacy in the Asia-Pacific region.Specifically he said that Japan will look to enhance diplomatic ties with China based on mutually beneficial goals."With China, this year marks the 40th anniversary of normalizing diplomatic ties. We will aim to deepen the mutually beneficial relationship based on common strategic interests," Gemba said Tuesday in his first foreign policy speech in parliament.He went on to say that Japan plans to proactively make " concrete efforts" to strengthen its ties with China and establish more "open and multilayered networks" in the best interests of both countries.