2 . One of the presents in my house this Christmas was a late 18th-century volume of the Encyclopaedia Britannica (大英百科全书). It is a window into the discoveries and thinking of the time. The encyclopaedia is an entertaining reminder of how _______ some of our current truths are bound to be. Certainties in areas we haven’t yet understood will look just as ridiculous as some of these in centuries to come. And one of those we are still remarkably _______ is the effect of food and exercise on our bodies. We’re surrounded by confident _______ on how to eat, how to avoid or reverse obesity (肥胖), and yet the advice seems pointless while the world gets fatter. Much of what we think we know is a pile of assumptions rather than _______ .

Our confusion is the theme of Spoon-Fed, a book by one of Britain’s leading nutrition researchers, Tim Spector of King’s College London. Its subtitle is: “Why almost everything we’ve been told about food is wrong.” It is a call for us to _______ more.

One by one Spector offers answers to recent food _______. Coffee can save our lives, he says. Three to four cups a day reduces the risk of heart disease and may cut the risk of death by 8 per cent. Butter does not damage our hearts, Spector argues, and salt is vital. Eggs have gone “from heroes to villains and back again”. Don’t say no to all red meat on _______ grounds; occasional small quantities of high-quality unprocessed meat provide important vitamins and iron and are “probably good for you“. Exercise is so good for longevity and happiness that it should be considered our No 1 drug, but the one thing for which it’s _______ useless is losing weight. Vitamin pills are a multibillion-pound industry with almost no proven _______ but which can cause real harm. Even vitamin D, which Spector used to study and believe in, he now _______.

Spector also offers more than a set of currently _______ tips. The science of nutrition has not been solved by him, as he would be the first to admit. His most _______ point is that there is no one size that fits all. Our bodies are complex, and our reactions are _______: yet nobody wants to pay for the research that might explain why.

Some combination of food choices, genes, environment and the chemical reactions generated by our microbiome — the unique microbe (微生物的) combinations in our body ― yes different _______ for each of us, leaving some lean and two thirds of us too fat. This is the territory Spector wants to explore further and which might just allow us to _______ the global trend to obesity, with all the risks we’ve witnessed this year.

3 . Are you sitting more than ever?     1     You’re probably sitting while reading this. Sometimes you sit when you are driving or attending a meeting. Other times you sit when you engage yourself in watching a movie or playing computer games. That’s undoubtedly a lot of sitting. The fact is, the amount of time spent sitting has increased over time.     2    

We know sitting too much is bad, and most of us naturally feel a little guilty after a long-time TV watching.     3     A study on nearly 8,000 adults suggests that there’s a direct relationship between the time spent sitting and our risk of early death of any cause. As the total sitting time increases, so does the risk of early death.

“Sit less, move more” is what the Heart Association encourages us to do.     4     It is like telling someone to just ”exercise“ without telling them how. Exercise guidelines are always more practical. For example, the Center for Disease Control recommends adults do exercise for two hours and 30 minutes every week, plus muscle strengthening activities two or more days a week. We need similar guidelines for sitting.

    5     “It would probably be like, for every 30 continuous minutes of sitting, stand up and move or walk for five minutes at a quick pace,” Diaz, the lead researcher said, adding that the study has put us a step closer to the satisfying guidelines. But more researches are needed to confirm their approach.

5 . Rene Campbell has devoted most of her life to shaping her figure into one completely against what society thinks a woman should look like.

“I was always very insecure about my body image, as everyone seemed to know for sure that women needed to look a certain way,” she says when reflecting on her motivation to transform herself.     1     For quite some time, she struggled with eating disorders because she was trying to keep her weight really low and appear skinny, like the women on magazine covers.     2     It was then that she became attracted by the way these seemingly confident women held themselves.

However, building her dream body—gaining over 85 pounds, going from a size 8 to 14—has had its challenges, too. “    3     When I tell them that I am a female bodybuilder, the first reaction is, ‘Muscles for women are just not attractive,’” Campbell says. Though she loves the way she now looks, she is sometimes treated with cruelty.

    4    Even though there is a huge market encouraging women to build muscles and tighten their figures, the ideal still stands for smaller waists, and thin legs, the so-called perfect figure. For women to build up strong muscles, it takes a strong heart.

“I gradually learn to ignore others’ voices and become committed to the training. It is a very big shift for me, and it has won me plenty of awards.     5     My bodybuilding journey makes me realize that I need to do things for myself.” Campbell says.

6 . Regular jogging (慢跑) can reduce your risk of health problems. If you’re new to jogging, getting started can seem a little difficult.     1    .

Fuel your body 2 hours before jogging

Eat a healthy meal rich in fruit and vegetables before jogging.    2    . It will also help muscle grow and repair. If you’re jogging for weight loss, try increasing your intake of fruit and vegetables. Reduce your intake of sugary food and drinks.

Warm up for 5 minutes before jogging

It’s very important to warm up before you jog.    3    .Some good warm-up exercises include doing knee lifts, side-stepping and climbing stairs. You may have heard that it’s important to stretch (拉伸) before you run, but stretching before exercise can put additional strain (拉紧) on your muscles. Therefore, focus on warming up before jogging.

    4    

Most people think how far and how long you run has to do with patience and a strong will. However, having the proper running form plays an important role in jogging. To make the most of your jogging, remember to keep your head straight and your muscles relaxed, avoid lifting your knees too high, and touch the ground lightly with the middle of your foot.

Cool down after your jogging

After jogging, you can avoid strain on your heart and muscles by doing cool-down exercise. Finish your jog with 5～10 minutes of walking.    5    , You should do deep stretches and hold each stretch for 15～30 seconds.

Pilates(普拉提), yoga and running, whether in the gym or at home, get all the attention when it comes to popular ways to keep fit.    1    (与它们相比，散步不是这么有吸引力，但它却有很多益处。)

Certified fitness professional Jolynn Jaekel explains, “What I love about walking is that anyone can do it at any age and any fitness level. Besides, it is good for your heart, your head and your wallet.     2    (很明显，散步是让人惊叹的运动，不是吗？)”

Scientists at the Lawrence Berkeley National Laboratory in California found that quick walking reduced the risk of heart disease more effectively than running.     3     (正是因为这个原因，一些有心脏病的人喜欢散步胜于跑步。) Scientists observed participants aged between 18 and 80 over a six-year period and found that walking reduced the risk of heart disease by 9.3%, while running reduced it by 4.5%. And there is better news: 30 minutes of quick walking over five days could help people sleep easily, according to research by Oregon State University.    4    (散步帮助青少年更好地睡眠，使得他们积极参加学校活动并专注于学校生活。)

    5    (你越早开始，你将会越早注意到散步对你的大脑和身体有巨大影响。) So, go out for your 30-minute walk in a nearby park or green space.