Did you know that sixty percent of your body weight is water? However, a loss of only two percent of this water through dehydration (脱水) during exercise can significantly affect your performance. The more you sweat, the more your exercise performance declines, unless you drink enough to replace your loss of fluids (液体).

    When you lose too much water, you can overheat quite easily, especially in a warm environment. But this is not the only problem you may face. Dehydration leads to your heart pumping much faster, which means exercise becomes more difficult and requires more effort. Despite these problems, however, many of us simply do not take enough fluids in when we head for the gym or set out on a run.

    So why is this? How do we manage to lose so much water without simply drinking more to replace it? Well, it's easier than you think. When we are at rest, we quickly become aware that we are thirsty and will put that right by having a drink. When we exercise, on the other hand, our thirst mechanism (结构) does not work as effectively, so we don't notice early enough that we are actually thirsty. In fact, we only start to fed thirsty when we have already lost around two percent of our body weight.

    Another problem is that, the more dehydration we become during exercise, the more difficult it is to prevent further dehydration-because our stomachs become intolerant (不能容忍的) to fluids and we do not absorb water properly, just when we need it most.

    The key thing about fluids and exercise is to manage your intake properly-regular small amounts are preferable, and some should be drunk before the period of exercise begins. You also need to match your intake to the sort of exercise you are doing. For example, for one hour of exercise, such as taking part in a 10 km run, you need to drink about two extra litres of water. For longer periods of exercise, sports drinks are recommended.

Events listed here are open to everyone. Whether you want to listen to a lecture, learn a new skill, take in a concert or an exhibition, see a play staged by Oxford University students or attend one of our sporting events, there's always something going on.

    Events are subject to change; please contact the organizer for full details.

    Qu Leilei: A Chinese Artist in Britain

    30 November 2017 to 15 April 2018

Contemporary Chinese artist Qu Leilei (born in 1951), now based in London, was a founding member of the creative ‘Stars Group' in the late 1970s, and immigrated to England in 1985. This exhibition shows his progression from calligraphic (书法的) art to an exploration of a new vocabulary of ink language mixing lively brushwork with western technique.

    The Brexit (脱欧) sword hanging over our universities

    29 November 2017

    Lord Bilimoria CBE，the Founder and Chairman of Cobra Beer and President of the University of Birmingham, will talk about Brexit, its influence on our universities, their academics and students as well as the future of international students in the UK.

    Oxford Botanic Garden Christmas Fair

    2-3 December 2017

    Escape the crowds and step inside a wonderland of hand-picked gifts, tasty food and family entertainment. Look through for extra-special Christmas presents at over 30 stands in the heated large tent. Pause for a glass of sweet hot wine and some delicious food, then follow the Alice in Wonderland path around the walled garden before stopping for tea with the Mad Hatter.

    The Art of Partying: A Feast for the Eyes!

    13 December 2017

    From Greek designs and Biblical weddings to Renaissance works and the celebratory styles of the twentieth-century painters, this lecture will examine the popular description of parties in the history of Western Art at the Ashmolean Museum.

    Mirroring China's Past: Emperors and Their Bronzes

    Chinese bronzes (青铜) of the second and first millennia BC are some of the most distinctive achievements in the history of art. These vessels (容器) were made to carry sacrificial offerings, to use in burial or to honor noble families in public ceremonies. When they were found by emperors centuries later, these spiritually significant objects were seen as signs of heavenly messages about a ruler or a dynasty and became prized items in royal collections. This exhibition —the first to explore these ancient objects throughout Chinese history — presents a rare opportunity to experience a large number of these works together in the United States.

    Unlike Greek and Roman bronze sculptures of human and animal forms, most objects from Bronze Age China (about 2000 - 221 BC) were vessels for ceremonial use. Beginning with the Song dynasty (960 - 1279), emperors unearthed these symbolic works and began collecting them, considering them to be evidence of their own authority as rulers. In addition to impressive collections, the royal fascination with bronzes led to the creation of numerous reproductions and the comprehensive cataloguing of palace holdings. These catalogues are works of art themselves, featuring beautiful drawings and detailed descriptions of each object.

    From the 12th century onward, scholars and artists also engaged in collecting and understanding ancient bronzes. Unlike emperors, scholars regarded bronzes as material evidence of their efforts to recover and reconstruct the past, and they occasionally exchanged them as tokens (象征) of friendship. Today ancient bronzes still occupy a primary position in Chinese culture — as historical objects and as signifiers of an important cultural heritage that inspires new generations, as seen in the works of contemporary artists on view in this presentation.

    Mirroring China's Past brings together approximately 180 works from the An Institute of Chicago's strong holdings and from the Palace Museum in Beijing, the Shanghai Museum, and important museums and private collections in the United States. By providing viewers with a new understanding of ancient bronzes and their significance through time, the exhibition demonstrates China's fascinating history and its developing present.

    HANGZHOU — Chinese internet giant Alibaba on Tuesday opened a hotel loaded with artificial intelligence (AI) and robots, automating a series of procedures like check­ in, lights control and room service.

    FlyZoo Hotel, opened in Hangzhou, capital of East China's Zhejiang province, where Alibaba is headquartered, is known as the company's "first future hotel". Customers can check into the hotel by simply scanning their faces. The facial recognition system installed in the hotel also enables customers to use their faces as key cards to open doors and access another hotel service. Users can also control the lights, televisions and curtains in the room via Alibaba's voice­activated digital assistant, while robots are deployed to serve dishes, cocktails and coffee. Hotel bookings and check­out can also be done with a few clicks on mobile through an app. "The AI­based solution can help customers save time and relieve hotel employees from repetitive work," said Wang Qun, CEO of FlyZoo Hotel. The hotel is the latest example of Chinese tech companies' attempt into traditional industries such as the hotel industry.

    E­commerce giant JD.com announced in October its strategy to put smart home and electronic devices sold on its platform into hotels, in an effort to improve online sales.

    In July, Baidu teamed up with Intercontinental Hotels Group in Beijing to allow guests to use its voice­ controlled assistant to adjust room temperature and order room service at ease.

    Before that, social media giant Tencent introduced QQfamily, a similar tech solution for hotel operators, in the southern city of Zhuhai last year.

    "We want to install a 'smart brain' for hotels," said Wang. "In the future, we will continue to make hotels smarter and more automated, as well as create more personalized experiences for consumers."

An Edinburgh inventor has created a fully biodegradable bottle that is made from paper and a secret combination of plant materials, and it could help save the planet's oceans from plastic pollution and can also be eaten by sea creatures.

The Edinburgh-based Durham University chemistry graduate James Longcroft started a non-profit bottled water company two years ago. He wanted to put all his profits into a charity that provided clean drinking water to countries in Africa.

However, after concerns about the environmental impact of plastic bottles, Mr. Longcroft decided the Edinburgh and London-based company, Choose Water, should go plastic-free. So he came up with a new type of water bottle—a waterproof paper bottle.

"The outside is made from recycled paper, but the inside has to be waterproof, and provides strength so the bottle would keep its structure, and keep the water fresh," Mr. Longcroft said.

When the bottle is thrown in the ocean the degrading process begins within hours leaving the bottle totally degraded (分解)within weeks. The steel cap breaks down within a year.

Mr. Longcroft now believes these novel bottles could revolutionise the industry and says the cost of producing the bottle is around 5 pence more than one made from single-use plastic.

"The main difficulty we face is breaking into a saturated (饱和的)market and competing with an old industry," he said. "Changing an industry will be a big uphill battle, but with the support from the public, we will change the way we look at bottled water."

Researchers warn that eight million tonnes of plastics currently find their way into the ocean every year which will stay in the environment for centuries.

"We really want to get our bottles on shelves and into people's hands as soon as possible—if we can stop even one plastic bottle ending up in the environment it will be worth it," said Mr Longcroft.