【推荐1】The rate of childhood obesity in the U.S. has tripled over the past 50 years. But what this trend means for children’s long-term health, and what to do about it (if anything), is not so clear.

The American Academy of Pediatrics (AAP) made waves this year by recommending that doctors put obese kids as young as two years old on intensive, family-oriented lifestyle and behavior plans.     1     This advice marks a shift from the organization’s previous stance of “watch and wait,” and it reflects the AAP’s belief that obesity is a disease and the group’s adoption of a more proactive position on childhood obesity.

Yet the lifestyle programs the AAP recommends are expensive, inaccessible to most children and hard to maintain — and the guidelines acknowledge these barriers. Few weight-loss drugs have been approved for older children, although many are used off-label.     2     And surgery, while becoming more common, has inherent risks and few long-term safety data — it could, for instance, cause nutritional deficits in growing children. Furthermore, it’s not clear whether interventions in youngsters help to improve health or merely add to the stigma overweight kids face from a fat-phobic society. This stigma can lead to mental health problems and eating disorders.

Rather than fixating on numbers on a scale, the U.S. and countries with similar trends should focus on an underlying truth: we need to invest in more and safer places for children to play where they can move and run around, climb and jump, ride and skate.

    3    In 2020 the Centers for Disease Control and Prevention found, unsurprisingly, that kids’ sports participation increases with their parents’ incomes: about 70 percent of kids whose families earn more than $105,000 a year participate in sports, but only 51 percent of middle-class kids and 31 percent of children at or below the poverty line do. This disparity hurts people of color the most. More than 60 percent of white children, for instance, participate in athletics, but only 42 percent of Black children and 47 percent of Hispanic children do. Experts blame these problems on the privatization of sports — as public investment in school-based athletics dwindles, expensive private leagues have grown, leaving many kids out.

According to the U.S. Department of Health and Human Services’ Physical Activity Guidelines for Americans, children between ages six and 17 should get at least an hour of moderate to intense physical activity every day. Yet only 21 to 28 percent of U.S. kids meet this target, two government-sponsored surveys found. The nonprofit Active Healthy Kids Global Alliance evaluates physical activity in American children, and in 2022 the group gave the U.S. a grade of D–.

Why is it so hard to get kids moving? In addition to fewer opportunities at school, researchers cite increased screen time, changing norms around letting kids play outdoors unsupervised, and a lack of safe places for them to play outside the home.

New York City, for example, had 2,067 public playgrounds as of 2019 — a “meager” amount for its large population, according to a report from the city comptroller — and inspectors found hazardous equipment at one quarter of them. In Los Angeles in 2015, only 33 percent of youths lived within walking distance of a park, according to the L.A. Neighborhood Land Trust. Lower-income neighborhoods tend to have the fewest public play spaces, despite often having a high population density.     4    

Kids everywhere need more places to play: trails, skate parks and climbing walls, gardens and ball fields, bike paths and basketball courts. Vigorous public funding to build and keep up these areas is crucial, but other options such as shared-use agreements can make unused spaces available to the public.

A．Moving more may not prevent a child from becoming overweight, but studies show clearly that it helps both physical and mental health.

B．And although rural areas have more undeveloped outdoor space, they often lack playgrounds, tracks and exercise facilities

C．A lack of safe places for them to play outside the home also contributes to kids obesity.

D．It also suggested prescribing weight-loss drugs to children 12 and older and surgery to teens 13 and older.

E．Increased screen time and changing norms around letting kids play outdoors are unsupervised.

F．They have significant side effects for both kids and adults.

【推荐2】A new study has found that braving the cold maybe a good way to help burn off some fat.

The research was carried out by scientists at Canada’s Laurentian University and focused on high-intensity interval training(HIIT). This format has grown in popularity of late due to the fat-burning benefits it brings, and the team set out to explore how temperature might influence its effects.

The study involved 11 overweight adults who took part in two HIIT sessions a week apart. One of these was carried out in a “thermoneutral” environment with temperatures of around 70 °F(21℃),and the other at a cold 32 °F(0℃). The sessions consisted of 10 separate cycling race at 90 percent effort lasting one minute, followed by 90-second “recovery” periods of cycling at30 percent intensity.

After each session, the participants cooled down by gently cycling or walking, ate a nutrition bar before going to sleep and enjoyed a high-fat breakfast the morning after. During these sessions, the scientists monitored skin temperature, core body temperature, heart rate and the amount of oxygen. Blood samples were also drawn to help calculate fat burning rates following the breakfast the next day.

“The present study found that high-intensity exercise in the cold increased lipid oxidation (脂质氧化) by 358 percent in comparison to high-intensity exercise in a thermoneutral environment,”the team writes.

The authors also note that the idea that cold temperatures help us burn more fat during exercise will need further investigation (调查), though the first-of-a-kind study does indicate it’s a possibility worth pursuing.

1. What is good for burning off fat according to the study?

A．Cold food.	B．Low temperature.
C．Hard workout.	D．Cycling race.

2. What is paragraph 3 mainly about?

A．Introduction to the study.

B．Some data in the study.

C．The participants in the study.

D．The process of the study.

3. What can we learn from the last paragraph?

A．Further study needs to be done.

B．Doing exercise burns more fat.

C．The efforts of scientists are in vain.

D．The study result is unreasonable.

4. What of the following could be the best title for the text?

A．High-intensity Workouts Help Burn off Extra Calories

B．Cycling in the Cold Is a Great Way to Build upYour Body

C．Study Shows Fat-burning Potential of Exercising in the Cold

D．Researchers Have Found More Fat-burning Workouts