3 . The Beijing 2022 Olympic Winter Games, just six months after the pandemic-delayed Tokyo Summer Olympics, will be held in a strict dosed loop to prevent infections.

•It will be required to be fully vaccinated at least 14 days before departure for China, in order to be allowed entry.

•Athletes and team officials may be exempted（豁免）for medical reasons only. Anyone not fully vaccinated will need to quarantine（检疫）for 21 days upon arrival in Beijing.

•The “My 2022” app will be needed to monitor and track your health for 14 days before your departure for China.

•A negative COVID-19 test result will be needed before your departure for China.

•Within the closed loop system, all Games participants will only move between permitted destinations in dedicated Games transport.

•COVID-19 screenings will happen daily during the Games.

•Avoid crowds if possible.

•Wear a face mask at all times, except when training, competing, eating, drinking, sleeping or when alone.

•Wash your hands regularly. Support athletes by clapping instead of singing or chanting.

•Get a test if you experience any symptoms.

4 . At the end of a long day, it’s tempting to dive into your social feeds or Netflix queue the minute you've finished eating. But back before screens took up all our free time, an after-dinner walk was a popular activity. “Italians have been walking after meals for centuries,” says Loretta DiPietro, a professor at the George Washington University, “so it must be good.”

Research backs this up. One study co-authored by DiPietro found that when older adults at risk for type-2 diabetes (糖尿病) walked for 15 minutes after a meal, they had steady blood sugar levels in the hours afterwards. The human digestive system turns food into glucose (葡萄糖). After a meal, glucose floods a person’s bloodstream. Insulin (胰岛素) helps pull that glucose into cells. But for people with impaired insulin activity, too much glucose can remain in the blood, which can cause heart disease and other health problems.

What good does walking do? “The muscles we use to walk use glucose as energy, drawing it out of circulation and therefore reducing how much is floating around,” says Andrew Reynolds, a postdoctoral research fellow at the University of Otago. Reynolds conducted a study of people with type-2 diabetes and found that just 10 minutes of walking after a meal helped control their blood sugar levels. “We saw the biggest differences with walking after dinner time,” compared to other times of the day, Reynolds says. “The production of insulin in response to a meal tends to decrease later in the day. Getting up and moving around at that time was very effective,” he says.

A little post-meal movement may also aid digestion. But more isn't necessarily better when it comes to post-eating exercise. “Exercising muscles pull more of the blood flow their way during activity, and the GI tract (消化道) gets relatively less,” says Sheri Colberg-Ochs, a researcher at Old Dominion University. “That actually slows down the digestion of food in your stomach during the activity. Anything but really intense exercise would probably work equally well.”

So make like the Italians and head out for a walk after your next meal. Your TV and the Internet will still be there when you get home.

5 . Though the Tokyo Olympic Games drew to a close on August 8, 2021, the public is still watching the athletes. Their outfits and the technologies that helped them in the competition have aroused people’s interest.

Su Bingtian, the first Chinese sprinter to reach an Olympic 100m final, has ascribed his breakthrough to scientific training. “It takes Su 47 steps to run 100 meters. Each step counts,” Liang Dong, a member of Su’s training team, told Shenzhen Evening News. “Randy Huntington, Su’s American coach and a biomechanics expert in track and field, has collected a lot of data on outstanding sprinters and built a database. He put in all of Su’s data and got a near-optimal model. When Su is training, the team uses high-speed cameras to record his training and compares it with the model to find out his weaknesses.”

Technology has also brought a new boost to table tennis. On July 27, the semifinal match between China’s Sun Yingsha and Japan’s Mima Ito was in full swing at the Tokyo Metropolitan Gymnasium. You wouldn’t have guessed that besides players, referees and audiences, a powerful AI platform was monitoring the match.

Every serve, swing and movement of Mima Ito was captured by this AI cloud platform deployed in Tokyo. At an average speed of 100 Mbps, the data was transmitted to the technical team of the Zhejiang University Table Tennis Intelligent Big Data Analysis Platform,2,442 kilometers away from the Tokyo Metropolitan Gymnasium, according to The Paper.

The Tokyo Olympic Games have seen not only scientific support in training, but many high-end technologies in athletes’ devices. For example, the Kenya women’s volleyball team’s GPS devices fed data on each player’s strength, heart rate and so on to coaches, who used the information to prevent injury and personalize training plans for each individual, South China Morning Post reported.

7 . The use of technology reaches all areas of the school world, including the subject of Physical Education. But working at a distance and without going to the school may seem a little complicated. However, this selection of applications （apps）is ideal for bringing sports education out of school.

Munzee

A gaming app in which students participate through their smartphones. It consists of searching and catching 'munzee' throughout the city. The munzees are cards with a QR code（二维码）that the teacher will hide and that the students must find in order to obtain points and advance in the game. To play the game you only need a mobile device with GPS and Wi-Fi.

Activilandia

This app seeks to promote a balanced diet and the practice of physical exercise in children between 6 and 12 years of age. To this end, they have developed this virtual theme park to fight overweight. The game combines recreational and educational content to convey that with small changes in lifestyle great health benefits can be achieved.

FTT Radio

Motivation is part of the training: with a favorable mood, the performance of physical exercises becomes much more bearable and tiredness is less noticeable. Under this concept this app has been created, which contains a great amount of music with high energy to activate the body and the mind. In addition, it contains songs of all types to suit musical tastes.

Genius App Manager

It aims to encourage children to move around and to reduce the use of digital devices. It gives the possibility of having a parental control for adults to block some applications. It also offers functions such as setting time for homework, sleeping, eating or showering.

8 . The Olympic spirit is about sportsmanship, personal sacrifice, and a strong will to reach your goals.     1     Instead, it’s a source of motivation to keep going and try to improve every day.

The importance of the Olympic spirit goes far beyond the sports events. And it’s not just for professional athletes, either.     2     Its goal is to encourage everyone, as people, and as citizens, to incorporate (使并入) these values into their lives.

It’s not easy to describe the Olympic spirit in words. Yet everyone who meets it probably knows what it means. One central aspect is having the knowledge that the greatest reward doesn’t lie in getting to a particular goal or victory.     3    

Of course, we’re not trying to suggest that victory means nothing to an athlete or that goals aren’t important. When we speak of personal or professional dreams or goals, we’re aware that reaching the objective is always one’s greatest wish.

Nevertheless, we shouldn’t forget that victory is the result of a long process. It’s only possible through the effort that leads up to it.     4     Everyone who manages to gain victory has to travel a long way to get there. And it must necessarily include some failures and disappointments, but must never end with the person giving up.

Let’s take a track and field race as an example-just to keep going along the line of this sports thread.     5     But all of the competitors are going to give the best of themselves throughout the competition. And you can expect they’ll continue to do so just to improve themselves even after the race.

9 . The Biggest Stadiums in the World

People have been pouring into stadiums since the days of ancient Greece. In around 80 A.D., the Romans built the Colosseum, which remains the world’s best known stadium and continues to inform contemporary design. Rome’s Colosseum was 157 feet tall and had 80 entrances, seating 50,000 people. However, that was small fry compared with the city’s Circus Maximus, which accommodated around 250,000 people.

These days, safety regulations-not to mention the modern sports fan’s desire for a good view and comfortable seat — tend to keep stadium capacities (容量) slightly lower. Even soccer fans tend to have a seat each; gone are the days of thousands standing to watch the match.

For the biggest stadiums in the world, we have used data supplied by the World Atlas list so far, which ranks them by their stated permanent capacity, as well as updated information from official stadium websites.

All these stadiums are still functional, still open and still hosting the biggest events in world sport.

·Rungrado 1st of May Stadium, Pyongyang D.P.R. Korea. Capacity: 150,000. Opened: May 1,1989.

·Michigan Stadium, Ann Arbor, Michigan, U. S. Capacity: 107,601. Opened: October 1, 1927.

·Beaver Stadium, State College, Pennsylvania, U. S. Capacity: 106,572. Opened: September 17, 1960.

·Ohio Stadium, Columbus, Ohio, U. S. Capacity: 104,944. Opened: October 7,1922.

·Kyle Field, College Station, Texas, U. S. Capacity: 102,512. Opened: September 24, 1927.