3 . When it comes to lowering blood pressure, studies have typically shown that aerobic (有氧的) exercises are best. Recent research suggests another type of physical activity is worth including as an effective tool to prevent and treat high blood pressure.

Exercises that engage muscles without movement, such as wall squats and planks, may be best for lowering blood pressure, according to a large study published in July, 2023 in the British Journal of Sports Medicine.

This type of training is known as isometric exercise, according to the Mayo Clinic. Isometric muscle action happens when muscles contract but do not visibly change length, and the joints involved don’t move, facilitating stability of the body. Isometric exercises can be done with weights or without, just relying on the body’s own weight.

“These findings provide a comprehensive data-driven framework to support the development of new exercise guideline recommendations for the prevention and treatment of high blood pressure,” said study coauthor Dr. Jamie O’Driscoll in a news release.

The researchers looked into randomized controlled trials that had reported the effects of exercise interventions, lasting two or more weeks, on blood pressure between 1990 and February 2023. From a review of 270 trials with 15,827 participants, the researchers found that among HIIT (high intensity interval training), isometric exercise, aerobic exercise, dynamic resistance training and a combination of the latter two, isometric exercise led to the greatest reductions in blood pressure.

It’s also important to note that there are other lifestyle changes as well as exercise that can benefit your blood pressure. These include keeping to a healthy weight, eating a balanced diet, cutting down on salt, not drinking too much alcohol and ensuring that you continue to take any prescribed medication.

More research is needed to determine exactly why isometric exercises might be better for lowering blood pressure than other types of training, the authors said.

4 . Tai chi, a traditional, slow-moving form of Chinese martial art, is known to increase flexibility and improve balance. Now, new research suggests it’s better than more energetic aerobic exercises (有氧运动) for lowering blood pressure in people with prehypertension (高血压前期). Prehypertension is considered a warning sign that heart disease may be ahead, and it raises the risk of having a heart attack.

The new findings, published in the journal JAMA Network Open, add to a large body of research pointing to health benefits from tai chi.

In the study, researchers in China randomly assigned 342 adults with prehypertension to one of two interventions. The average age of participants was 49. Roughly half the people participated in aerobic exercises, including jogging, climbing stairs, brisk walking and cycling. The other half was trained to practice tai chi. Both groups got hour-long sessions four times a week.

After 12 months, those in the tai chi group saw bigger drops in their blood pressure than those in the aerobic exercise group. What’s more, nearly 22% of the people who practiced tai chi saw their blood pressure fall to within normal range, compared with nearly 16% of people in the aerobic exercise group. And fewer patients in the tai chi group went on to develop hypertension than in the aerobic exercise group.

How does tai chi help lower blood pressure? The practice tends to cause more of a response from the parasympathetic nervous system (副交感神经系统), says Ruth Taylor-Piliae, a professor at the University of Arizona’s College of Nursing, who was not involved in the study. The parasympathetic nervous system is the network of nerves that relaxes your body after periods of stress or danger.

“I think the beauty of tai chi is that you don’t have to have a special gym membership or special clothing,” Taylor-Piliae says. “Once you learn tai chi, you can do it anytime, anyplace, anywhere. And it does kind of provide that calming, relaxing effect.”

On February 10, 2024 ambitious young scientists flooded Brown University’s classrooms and laboratories, ready to put their knowledge to the test at the 7th Annual Brown Science Olympiad tournament, which provided a     1     (true) enriching and enjoyable experience for all involved.

The STEM competition welcomes nearly 1, 000 high schoolers from across New England.     2     (feature) a lineup of 23 diverse challenges, the single-day academic tournament integrates written assessments with hands-on design and build tasks. Each challenge     3     (score) individually, with points awarded based on performance, accuracy and completion of tasks. Teams win by accumulating (累积) the highest total score across all 23 challenges in the tournament.

Contestants get     4     (them) involved in various scientific disciplines, from fundamental subjects like biology, chemistry and physics to     5     (specialize) areas such as astronomy and robotics. Throughout the event, students engage     6     a series of activities in a day filed with curiosity, creativity, exploring the     7     (wonder) of science and pushing the boundaries of their intellectual capabilities.

But the Brown tournament isn’t just about becoming a strong competitor. It also offers a platform for young scientists     8     (wander) Brown’s campus. “With the tournament, you can get an insight into college life and     9     great understanding of the whole college experience,” Golditch a contestant, said. “Participating in the Science Olympiad has been the most valuable experience     10     allows us to explore fun science concepts,” added Golditch.

7 . A team of three students won $700,000 this week for using artificial intelligence (AI) to read passages from an ancient papyrus scroll (纸草卷轴). The document is one of the more than 800 scrolls known as the Herculaneum papyri that were carbonized by the eruption of Mount Vesuvius in 79 AD. Researchers discovered the passages in the 18th century, but attempts to read them proved in vain: Unfolding them by hand only caused them to fall apart.

That’s where the Vesuvius Challenge comes in. Brent Seales, a computer scientist, and two businessmen, Nat Friedman and Daniel Gross, launched the Vesuvius Challenge in March 2023, offering more than $1 million in prize money for reaching a series of milestones using “computer vision, machine learning and hard work”. For the biggest prize, the organizers released high-resolution CT scans of the scrolls and explained the contest’s rules: Participants would need to decipher (破译) at least 85 percent of four passages. A series of smaller prizes were also awarded throughout the year.

The winning team consists of Nader (an Egyptian PhD student in Germany), Julian Schilliger (a robotics student in Switzerland) and Luke Farritor (a computer science student in Nebraska). Their submission was “met with widespread amazement” by the review team of papyrologists. Farritor also won the challenge’s $40,000 “First Letters” prize in October, when he deciphered the scroll’s first word “porphyras”, which means “purple” in ancient Greek. Nader and Farritor began working together the following month and were joined by Schilliger shortly before the December 31 deadline.

The team ultimately trained machine-learning algorithms (算法) to decipher more than 2,000 characters—more than what was needed to win the Grand Prize. These passages appear to be a philosophical discussion of life’s pleasures, including music and food, though the papyrology team is still studying the results. “It seems familiar to us, and we can’t escape the feeling that the first text we’ve uncovered is a 2,000-year-old blog post about how to enjoy life,” write the organizers.