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China to Send Fresh Crew to Tiangong Space Station

A staff member poses for photos in front of a board featuring China's astronauts, after a press conference ahead of the Shenzhou-18 space mission, at the Jiuquan Satellite Launch Centre in the Gobi desert, in northwest China on April 24, 2024. (Photo by GREG BAKER / AFP)
A staff member poses for photos in front of a board featuring China's astronauts, after a press conference ahead of the Shenzhou-18 space mission, at the Jiuquan Satellite Launch Centre in the Gobi desert, in northwest China on April 24, 2024. (Photo by GREG BAKER / AFP)
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China to Send Fresh Crew to Tiangong Space Station

A staff member poses for photos in front of a board featuring China's astronauts, after a press conference ahead of the Shenzhou-18 space mission, at the Jiuquan Satellite Launch Centre in the Gobi desert, in northwest China on April 24, 2024. (Photo by GREG BAKER / AFP)
A staff member poses for photos in front of a board featuring China's astronauts, after a press conference ahead of the Shenzhou-18 space mission, at the Jiuquan Satellite Launch Centre in the Gobi desert, in northwest China on April 24, 2024. (Photo by GREG BAKER / AFP)

China will send a fresh crew to its Tiangong space station on Thursday evening, Beijing's Manned Space Agency announced, the latest mission in a program that aims to send astronauts to the Moon by 2030.

The Shenzhou-18 mission -- crewed by three astronauts -- is scheduled to take off at 8:59 pm Thursday (1259 GMT) from the Jiuquan Satellite Launch Center in northwest China, Beijing announced Wednesday.

It will be led by Ye Guangfu, a fighter pilot and astronaut who was previously part of the Shenzhou-13 crew in 2021.

At a press conference on Wednesday, Commander Ye described the launch as a "new beginning".

"Facing the challenge, my two teammates and I are fully prepared. We are full of confidence in completing this mission!" he said.

Li Guangsu, in turn, said he wanted to take a "good look at the beautiful blue planet, the splendid mountains and rivers of the motherland, and find the places that have nurtured me along the way".

"I also want to see for my lovely child if the stars in the sky can really twinkle or not," he added.

The latest batch of Tiangong astronauts will stay in orbit for six months, carrying out experiments in gravity and physics, as well as in life sciences, Agence France Presse reported.

They will also carry out a "project on high-resolution global greenhouse gas detection", Deputy Director General of the CMSA Lin Xiqiang said, according to state news agency Xinhua.

"All pre-launch preparations are on schedule," he said.

"They will work with other active astronauts to carry out the follow-up space station missions and to realize the country's manned lunar landing."

The Tiangong, which means "heavenly palace", is the crown jewel of a space program that has landed robotic rovers on Mars and the Moon, and made China the third country to independently put humans in orbit.

It is constantly crewed by rotating teams of three astronauts, with construction completed in 2022.

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Should You Stretch before Exercise? After? Never? Here’s What to Know

Philadelphia Eagles stretch as they get ready during practice at NFL football training camp, Thursday, July 25, 2024, in Philadelphia. (AP)
Philadelphia Eagles stretch as they get ready during practice at NFL football training camp, Thursday, July 25, 2024, in Philadelphia. (AP)
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Should You Stretch before Exercise? After? Never? Here’s What to Know

Philadelphia Eagles stretch as they get ready during practice at NFL football training camp, Thursday, July 25, 2024, in Philadelphia. (AP)
Philadelphia Eagles stretch as they get ready during practice at NFL football training camp, Thursday, July 25, 2024, in Philadelphia. (AP)

For many people of a certain age, high school gym class began with reaching for their toes. Then, over the years, we were told it was better to stretch after exercise.

It turns out, both those things can be true, but the differing advice has created some confusion.

Stretching can help make you more flexible, improve range of motion in your joints — and feel good. David Behm, who researches human kinetics at Memorial University of Newfoundland in St. John’s, Canada, offers this advice on when to stretch and how to do it safely:

Warm up first

It’s almost always good to stretch, but it’s better if you warm up first, said Behm, author of "The Science and Physiology of Flexibility and Stretching." He recommends a light aerobic activity such as jogging, walking or cycling for five or 10 minutes.

Follow that with some static stretching, the traditional way of reaching and holding a position (think back to that gym class). You can then do activity-specific dynamic stretching, in which you warm up the muscles with repetitive movements like leg lifts.

Behm says one minute is "the magic number" for how long to do static stretching per muscle group without fatigue.

Expand your definition of 'stretching'

Should you always stretch before exercising? If it's traditional stretching, not necessarily.

The better question, Behm says, is, "Should people increase their range of motion? Should people have better flexibility? And that is yes, because it helps prevent injuries. It helps with health. But you don’t have to stretch to achieve that."

Resistance training, for instance, can be an effective form of stretching, he said. Doing a chest press increases range of motion in your deltoids and pecs, whether with barbells, dumbbells or machines, so there is no need to stretch beforehand. Just make sure to start with a small amount of weight to warm up and then add more to train.

"You probably don’t have to do extra stretching unless you’re a gymnast, a figure skater, or even a golfer who needs a great range of motion through that swing," Behm said.

Nor do you need to stretch first if you’re going for a leisurely run. Simply start with a slow jog to warm up and then increase the pace.

Don't do it if it hurts

After exercise, "light stretching is OK, as long as you don't reach a point where you're feeling pain," Behm said. Since your muscles will be warm by that point, overdoing it makes you more likely to injure yourself.

Foam rollers can help with muscle recovery and have been shown to increase range of motion as well as stretching.

Do some static stretching before sports

If you’re playing a sport, Behm said, static stretching beforehand helps reduce muscle and tendon injury.

"If you’re going to do an explosive movement, change of direction, agility, sprint, any of these explosive activities that involve your muscles and tendons," he said, "you’re going to be stronger if you do static stretching."

People can especially get in trouble when they go back to a sport they used to play, whether it's tennis, surfing or any sort of team activity.

Also, stretch both sides equally. Lacking flexibility on one side also can lead to injury.

Sounds simple. Why all the confusion? Different studies over the years have either encouraged or discouraged stretching before exercise. Behm says that partly because some studies didn't reflect real-life conditions, or were designed with elite athletes in mind, not regular people.

"If you’re Usain Bolt, it makes a difference," said Behm. Not so much for the rest of us.