Researchers say current exercise guidelines are unrealistic and argue that doctors should sometimes advise small increases in activity instead. They warn the 150-minute weekly target is beyond the reach of some people - particularly older individuals. And striving to reach these goals could mean the benefits of lighter exercise are overlooked. But public health officials say current recommendations have proven benefits in lowering the risk of heart disease.

    There is increasing evidence that inactivity is linked to heart disease, Type 2 diabetes (糖尿病) and some types of cancer. UK guidelines for adults recommend at least two-and-a-half hours of moderate activity a week, in short periods of 10 minutes or more.

    But in two separate articles in the BMJ, experts argue the message needs to change, with greater emphasis on making inactive people move more. Prof Philipe de Souto Barreto at the University Hospital of Toulouse, advises people who sit too much to make small increases in their activity levels - rather than pushing to achieve current goals. He points to previous studies which show even short periods of walking or just 20 minutes of vigorous activity a few times a month can reduce the risk of death, compared to people who do no exercise.

In the second article, Prof Phillip Sparking of the Georgia Institute of Technology, says doctors should tailor their advice — particularly for older patients. He suggests using GP visits for people over 60 to discuss “realistic options” to increase activity — such as getting people to stand up and move during TV commercial breaks.

    Prof Kevin Fenton at Public Health England, says: “Everyone needs to be active every day — short periods of 10 or more minutes of physical activity have proven health benefits, but getting 150 minutes or more of moderate activity every week is the amount we need to positively impact on a wide range of health conditions.” This includes reducing the risk of heart disease and type 2 diabetes.”

C

    The animal kingdom lost a beloved friend when poachers（偷猎者）in Kenya killed the world famous elephant named Satao solely for his ivory（象牙）, experts say.

    Satao was considered by some to be the largest and oldest elephant left in Africa. His tusks having grown long enough to reach the ground. Wandering around Kenya's Tsavo National Park, he was easily recognizable（可辨认的）by staff and visitors. Sadly, despite conservation efforts, he was killed on May 30, his body identified by park staff on June 2. His head was severely damaged and there were two holes left where his great tusks had

    “There is no doubt that Satao is dead, killed by an ivory poacher's poisoned arrow to feed the seemingly greedy demand for ivory in far off countries,” wrote Richard Moller of The Tsavo Trust. “A great life lost so that someone far away can have a trinket（饰品）.

    Satao isn't the first elephant—and far from the last—to pay the ivory price. Just last month, Mountain Bull, another Kenyan elephant, was killed by poachers.

    Kenya Wildlife Service（KWS）says 97 elephants and 20 rhinos have been killed this year, but others say the real numbers are much higher.

    The national park in which Satao lived is roughly 386 square miles—a massive land for already thinly-stretched resources to cover. Reports indicate that Satao had started to migrate towards the park's border-areas known by conservationists（野生保护人士）to be highly active for poaching.

    In the late 1960s, more than 275,000 elephants lived in Kenya. Now, that number has dropped to around 38,000, and continues to fall fast.

    “If Satao's death can cause the focus on what's actually happening here in terms of poaching, then he won't have died in vain,” said nature documentarian Mark Decble, according to The Dodo.

    I remember meeting him one evening with his pushcart. I had managed to sell all my papers and was coming home in the snow. It was that strange hour in downtown New York when the workers were pouring homeward in the twilight. I marched among thousands of tired men and women whom the factory whistles had unyoked. They flowed in rivers through the clothing factory districts, then down along the avenues to the East Side.

    I met my father near Cooper Union. I recognized him, a hunched, frozen figure in an old overcoat standing by a banana cart. He looked so lonely, the tears came to my eyes. Then he saw me, and his face lit with his sad, beautiful smile-Charlie Chaplin's smile.

    "Arch, it's Mikey," he said. "So you have sold your papers! Come and eat a banana."

    He offered me one. I refused it. I felt it crucial that my father sell his bananas, not give them away. He thought I was shy, and coaxed and joked with me, and made me eat the banana. It smelled of wet straw and snow.

    "You haven't sold many bananas today, pop, "I said anxiously.

    He shrugged his shoulders.

    "What can I do No one seems to want them."

    It was true. The work crowds pushed home morosely（愁眉苦脸的）over the pavements. The rusty sky darkened over New York buildings, the tall street lamps were lit, innumerable trucks, street cars and elevated trains clattered by. Nobody and nothing in the great city stopped for my father's bananas.

    "I ought to yell," said my father dolefully. "I ought to make a big noise like other peddlers, but it makes my throat sore. Anyway, I'm ashamed of yelling, it makes me feel like a fool. "

    I had eaten one of his bananas. My sick conscience told me that I ought to pay for it somehow. I must remain here and help my father.

    "I'll yell for you, pop," I volunteered.

    "Arch, no," he said," go home; you have worked enough today. Just tell momma I'll be late. "

    But I yelled and yelled. My father, standing by, spoke occasional words of praise, and said I was a wonderful yeller. Nobody else paid attention. The workers drifted past us wearily, endlessly; a defeated army wrapped in dreams of home. Elevated trains crashed; the Cooper Union clock burned above us; the sky grew black, the wind poured, the slush burned through our shoes. There were thousands of strange, silent figures pouring over the sidewalks in snow. None of them stopped to buy bananas. I yelled and yelled, nobody listened.

    My father tried to stop me at last." Nu," he said smiling to console me," that was wonderful yelling, Mikey. But it's plain we are unlucky today! Let's go home."

    I was frantic, and almost in tears. I insisted on keeping up my desperate yells. But at last my father persuaded me to leave with him.

Earth Day Photo Contest

    A picture is worth a thousand words! Enter the TFK photo contest and show us: Why is Earth Day important to our planet?

    To enter the contest online, visit timeforkids.com and get details below.

    TIME

    ●The contest begins on January 9, 2017.

    ●The contest ends on April 20, 2017.

    INSTRUCTIONS

    ●An original and previously unpublished photograph that answers the Earth Day question "Why is Earth Day important to our planet?" and that was photographed by the entrant (参赛者) between June 1, 2016, and April 20, 2017.

    ●A brief description describing the picture: what is happening, where the photo was taken, the date the photo was taken and why the entrant chose to enter this image.

    ●Entrant's first name only; entrant's e-mail address; and parent's, teacher's or guardian's e-mail address. Limit one work per person. Sponsors are not responsible for lost, late, or incomplete entries, or entries not received for any reason. Works belong to sponsors, and none will be acknowledged (承认) or returned.

    ●By entering, the entrant ensures that the work is first made and has not been published in any medium or won an award.

    ELIGIBILITY

    Open to the elementary school students at age 8-13 at the time of entry in the USA.

    WINNERS' LIST AND PRIZES

    Judges will select 10 semifinalists (半决赛选手) from whom one grand prize winner and nine finalists will be chosen. The grand prize winner will receive a digital camera—approximate retail (零售) value: $300. The photograph entry of the grand prize winner will be published in the April 22 Earth Day issue of TIME For Kids. The photograph entries of all semifinalists will be published in the gallery of timeforkids.com. Winners will be informed by e-mail, and must respond within five days.

How to gain happiness? Aristotle, a famous Greek philosopher（哲学家）, believed that happiness is achieved through the development of certain virtues, stressing a balanced lifestyle. {#blank#}1{#/blank#}.

Balancing Personal Strengths and Relationships

Aristotle combined virtues like modesty, honesty, and sociability into one principle: balance knowing yourself with getting along with others. Modesty（谦虚）involves recognizing both your true strengths and weaknesses clearly. {#blank#}2{#/blank#}. Honesty means being true in your expressions. Sociability stresses the necessity of making and keeping friends.

Managing Emotions and Actions

{#blank#}3{#/blank#}. Aristotle said it's normal to feel emotions like anger, but the key to happiness is how you handle these feelings. Justice（公平）involves treating others fairly and balancing one's needs with the needs of others. Strength involves facing fears and carefully considering risks before acting, which helps you achieve your goals confidently.

Practicing Kindness and Tolerance（宽容）

Generosity, tolerance, and grace are virtues that Aristotle considered to be part of kindness. Generosity isn't just about giving things to others, but also about doing so thoughtfully. {#blank#}4{#/blank#}. Grace combines a sense of humor with the seriousness required in certain situations, helping to keep a pleasant and supportive presence around others.

{#blank#}5{#/blank#}. He teaches us that happiness is not just about seeking pleasure or avoiding pain, but about developing a balanced character. By developing these virtues and finding a balance in everything we do, we can lead truly happy and satisfying lives.

A. Aristotle stressed the importance of knowing oneself

B. This principle combines self-control, justice, and strength

C. Such realistic self-view makes you more confident and happier

D. Tolerance involves excusing others' mistakes while keeping self-respect

E. In short, Aristotle's approach to happiness is about finding balance in life

F. Here's a simple explanation of his ideas designed for high school students

G. A person who knows how to be happy needs to develop a balanced sense of justice

I remember that every year in lunar December in my hometown, Xinyang, each family begins to prepare bunches of bacon and sausage hanging from yard to yard {#blank#}1{#/blank#} (embrace) the upcoming New Year. Walking in such a street view and sniffing the smell of pickled bacon (腊肉), I always have a sense of {#blank#}2{#/blank#} (happy).

Xinyang, located on the boundary between the north and the south, is rich in rice, wheat and fertile land due to its unique {#blank#}3{#/blank#} (geography) position and climate. Therefore, it cultivates the characteristics of Xinyang people who have a good appetite {#blank#}4{#/blank#} delicacies. According to relevant records, the history of Xinyang's pickled bacon dates back to the Ming Dynasty, {#blank#}5{#/blank#} the locals learned to keep its special taste by preserving it in a special wooden bucket. People in Xinyang love their life so much that even during the toughest times, they still inherited the soul of taste and made delicious pickled bacon. Actually, Xinyang's pickled bacon is made in a {#blank#}6{#/blank#} seemingly simple way by drying the meat in the shade but it brings out the flavor of the food {#blank#}7{#/blank#} (it) and stays with our memory for long.

You'll never become fully conscious of how much you value it until you {#blank#}8{#/blank#} (tear) apart from it. Such is Xinyang's pickled bacon, one of my {#blank#}9{#/blank#} (forget) memories of my hometown despite time {#blank#}10{#/blank#} (tick) by.