3 . Not long after the first fitness magazine was published, a list probably followed soon after, ranking the best fitness equipment. This tradition has continued, with the implied message: use this and exercise will be yours.

And that's part of the problem, says Dr. Lieberman, a professor of Harvard University. There isn't one “best” anything to achieve fitness. Besides, people understand exercise is good for them. Knowledge about exercise still doesn't motivate.

Before you can answer why, it helps to look at history. Before the Industrial Revolution, people fetched water and walked up stairs because they had to. But then technology made life and work easier. Exercise has become something that people have to carve out time for. “It's a fundamental instinct to avoid physical activity when it's neither necessary nor rewarding,” he says.

It would seem like being healthy would qualify as necessary, but a doctor's prescription to exercise “can make it like taking cod liver oil,” Lieberman says. “Sometimes it works, but more often than not, it doesn't. And it's still coming across as an order, and “not having a heart attack in five years is not an immediate reward,” says Dr. Beth Frates, assistant professor at Harvard Medical School.

People might not want to exercise because it's never been enjoyable. Most of us probably have memories of gym class, not being picked for a team, or being in a fitness center that's filled with in-shape people. The majority don't feel excited. They feel that exercise isn't for them, but it can be. Coaching people in an empowering and motivating way can work much better than ordering someone to exercise. It starts with an expanded definition of what counts as exercise, and an injection of what's rarely used to describe exercise, but is certainly allowed: namely, fun.

5 . As a result, she says, some of the injuries associated with running, such as runner’s knee, are uncommon among race walkers. But the sport’s strange form does place considerable stress on the ankles and hips, so people with a history of such injuries might want to be cautious in adopting the sport. In fact, anyone wishing to try race walking should probably first consult a coach or experienced racer to learn proper technique, she says. It takes some practice.

6 . Kite surfing is a sport that takes place on the surface of the water, on top of boards that are similar in design to wakeboards (尾波滑水板), with the surfer pulled by a kite. The popularity of kite surfing has grown, although it is rather difficult to master. Kite surfing uses the same equipment as kite boarding, but is generally given more to riding on top of waves, rather than on smaller lakes or other calm bodies of water.

Early experiments in kite transportation took place through the 19th century, and at the dawn of the 20th century Samuel Cody crossed the English Channel using kites and a small boat. Kite surfing itself, however, wasn’t really born until the late 1970s. Beginning in that decade, more people became involved in using kites for personal transport and sport. Kite technology itself advanced enormously during the 1970s, with kites becoming much more controllable.

The early kite surfing was rather accidental, but innovators continued to develop the technology to make it easier to control and safer. By the late 1990s, kite surfing was becoming popular off the coast of Maui, France and throughout the world. In 1997, a special kite system was built specifically for kite surfing, which helped kite surfing into the mainstream.

Because of the high speeds and the dangers, it is generally recommended that would-be kite surfers take at least a few basic classes to learn the fundamentals. The main attraction of kite surfing is the potential for amazing tricks. The kite allows the surfer to experience enormous jumps, flying through the air for large distances before hitting the water in a controlled fashion. Like skateboarding, kite surfing makes use of a number of board grabs, with complex tricks possible due to the long period of time the surfer can remain in the air.

7 . Trying to stand out from millions of videos on the social networking platform Douyin can often be difficult, but a relatively new account(帐号), which has only been active since last year, has managed to do so easily.

The star behind this account is not a young woman with a slim figure, but a 70-year-old woman. Within just a few months Chen Jifang has attracted over 400, 000 followers with her energetic workouts (锻炼). She was once even featured on a reality show on CCTV.

"The main group that I wanted to encourage was people aging 30 to 50," says Chen. "I think they will be encouraged to work out after seeing that a granny like me can. It is never too late to pursue(追求)good health."

Chen's passion for exercising was born out of a need instead of desire to become famous. Her health had been poor since she was a child. In 2018, she was diagnosed with a lot of problems such as a fatty liver and hyperlipidemia(高血脂). The doctor suggested that she exercise more to stop the further decline of her already poor health.

Overweight Chen started with light jogging, but a fitness coach persuaded her to enter a gym on Dec 29, 2018. "Everyone in the gym was young. They were giving me curious looks," recalls Chen, who walks 3.5 kilometers to the gym every day.

Her daily training started at 8 am with 50 pushups(俯卧撑)and running. After a short break at 9 am, Chen continued working out until 3 pm. She hit the gym every day in 2019. She also gave up her favorite foods like barbecued meats and spicy hotpot.

When her health improved, Chen did more challenging workouts like weightlifting. Three months later, she lost 28 kilograms. Her health index also returned to normal.

"We cannot stop aging, but exercise can slow it down," she says. "Instead of spending money on medicine, it is better to spend money on fitness."

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.

10 . “Taijiquan is a traditional physical practice in China characterized by relaxed, circular movements that work with breath regulation.” thus reads the introduction of Taijiquan by the United Nations Educational, Scientific and Cultural Organization(UNESCO) on its website. Also referred to as T'ai Chi or Chinese boxing, Taijiquan has been a well-known physical practice worldwide. For a long time, different stories regarding the birthplace of Taijiquan have made the rounds, focusing mainly on two places-Wudang Mountain in Hubei Province, central China, and Wenxian County.

A tale tells how a man named Zhang Shanfeng created Taijiquan about 1,000 years ago after witnessing a fight between a sparrow and a snake, drawing inspiration from the animals' movements. The Wudang Mountain is known as one of China's major Taoist land-marks. This oldest philosophy of China has had a great impact on Taijiquan.

The story about its Chenjiagou origin has some more hard proof. In the mid-17th century, a retired general and village head named Chen Wangting combined his kungfu training with elements of Chinese philosophy to create Chen style Tai Chi. Popular belief holds that many modern styles of Taijiquan have been derived from the Chen style. Wenxian is listed as Taijiquan's birthplace on the UNESCO website.

Different from Shaolin Kungfu's powerful approach, Taijiquan looks softer and slower. This soft yet powerful spirit runs through the style of Chenjiagou, which has about 300 years of Taijiquan history.

The Chen style Taijiquan was passed down the generations. Chen Ziqiang is a direct offspring of Chen Wangting. His uncle Chen Xiaowang is now a world-renowned T'ai Chi master and his father Chen Xiaoxing, a leading actor in the video that China submitted to the UNESCO when applying for the honor, also has gained international fame.