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Struggling with negative thoughts? Regular exercise can help reduce them
If you've ever been trapped in a cycle of worry or obsessive rumination, here's something promising: A new study published in the medical journal PLOS ONE titled ' Does physical activity-based intervention decrease repetitive negative thinking? A systematic review' suggests that regular physical activity can significantly reduce repetitive negative thinking (RNT), the kind that fuels anxiety and other mental health disorders. But there's a catch: it works best when sustained and combined with psychological training. Researchers from China, South Korea and Poland reviewed 19 studies involving over 1,000 participants and found that physical activity-based interventions, especially those involving aerobic and resistance exercises or mindfulness practices like yoga, could reduce worry and rumination.
What is repetitive negative thinking and why does it matter?
Repetitive negative thinking (RNT) is a mental loop where your brain keeps revisiting the same worries or regrets, often in a way that feels uncontrollable. It includes two common forms: rumination (dwelling on the past) and worry (anxiety about the future). These patterns are incredibly hard to break. According to Cleveland Clinic, an American nonprofit academic medical center based in Ohio, RNT can be a symptom of various mental health conditions like anxiety, depression, obsessive-compulsive disorder (OCD), or post-traumatic stress disorder (PTSD).
Can physical activity help reduce negative thoughts?
Yes, but with some nuances. The study found that moderate-to-high intensity physical activity, done regularly (30–60 minutes per session, 3–5 times a week), can significantly reduce both rumination and worry. However, the best outcomes were seen when physical activity was combined with psychological interventions, like mindfulness or cognitive training.
Think of it as mental fitness, it builds up over time, just like muscle strength.
Which types of exercise work best?
According to the study, a mix of aerobic activities (like running or cycling), resistance training, and mind-body practices (like yoga or tai chi) showed the strongest results. Programs that blended both physical and psychological components had the greatest impact on reducing RNT.
Who benefits the most from exercise-based interventions?
The study revealed that people who were already dealing with clinical depression, anxiety, or chronic stress experienced more significant improvements than healthy individuals. So if you're struggling, this approach may be effective for you.
How does exercise influence the brain to reduce negative thinking?
Several mechanisms are at play, the study shows:
Physiological: Exercise boosts endorphins, reduces cortisol, and improves brain function and neuroplasticity.
Psychological: It improves cognitive control and helps regulate emotions.
Social: Group activities promote connection, which helps reduce stress and negativity.
What's the ideal for mental health through movement?
According to the study, the sweet spot for mental relief is:
Moderate-to-high intensity workouts
30–60 minutes per session
3–5 times a week
At least 8–12 weeks of consistency
Combine with mindfulness, meditation, or therapy-based training
Should you start exercising to tame your mind?
Absolutely. Whether it's brisk walking, dance, gym workouts, or yoga, moving your body regularly can quiet your mind. If you are struggling with overthinking, pairing exercise with mindfulness or therapy could be your best strategy yet. For more health updates, follow #HealthWithBS

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Scroll.in
an hour ago
- Scroll.in
Hidden in plain sight, chronic stress is key to increased dementia and Alzheimer's risk
The probability of any American having dementia in their lifetime may be far greater than previously thought. For instance, a 2025 study that tracked a large sample of American adults across more than three decades found that their average likelihood of developing dementia between ages 55 to 95 was 42%, and that figure was even higher among women, Black adults and those with genetic risk. Now, a great deal of attention is being paid to how to stave off cognitive decline in the aging American population. But what is often missing from this conversation is the role that chronic stress can play in how well people age from a cognitive standpoint, as well as everybody's risk for dementia. We are professors at Penn State in the Center for Healthy Aging, with expertise in health psychology and neuropsychology. We study the pathways by which chronic psychological stress influences the risk of dementia and how it influences the ability to stay healthy as people age. Recent research shows that Americans who are currently middle-aged or older report experiencing more frequent stressful events than previous generations. A key driver behind this increase appears to be rising economic and job insecurity, especially in the wake of the 2007-2009 Great Recession and ongoing shifts in the labor market. Many people stay in the workforce longer due to financial necessity, as Americans are living longer and face greater challenges covering basic expenses in later life. Therefore, it may be more important than ever to understand the pathways by which stress influences cognitive aging. Social isolation and stress Although everyone experiences some stress in daily life, some people experience stress that is more intense, persistent or prolonged. It is this relatively chronic stress that is most consistently linked with poorer health. In a recent review paper, our team summarised how chronic stress is a hidden but powerful factor underlying cognitive aging, or the speed at which your cognitive performance slows down with age. It is hard to overstate the impact of stress on your cognitive health as you age. This is in part because your psychological, behavioral and biological responses to everyday stressful events are closely intertwined, and each can amplify and interact with the other. For instance, living alone can be stressful – particularly for older adults – and being isolated makes it more difficult to live a healthy lifestyle, as well as to detect and get help for signs of cognitive decline. Moreover, stressful experiences – and your reactions to them – can make it harder to sleep well and to engage in other healthy behaviors, like getting enough exercise and maintaining a healthy diet. In turn, insufficient sleep and a lack of physical activity can make it harder to cope with stressful experiences. Prevention efforts A robust body of research highlights the importance of at least 14 different factors that relate to your risk of Alzheimer's disease, a common and devastating form of dementia and other forms of dementia. Although some of these factors may be outside of your control, such as diabetes or depression, many of these factors involve things that people do, such as physical activity, healthy eating and social engagement. What is less well-recognised is that chronic stress is intimately interwoven with all of these factors that relate to dementia risk. Our work and research by others that we reviewed in our recent paper demonstrate that chronic stress can affect brain function and physiology, influence mood and make it harder to maintain healthy habits. Yet, dementia prevention efforts rarely address stress. Avoiding stressful events and difficult life circumstances is typically not an option. Where and how you live and work plays a major role in how much stress you experience. For example, people with lower incomes, less education or those living in disadvantaged neighborhoods often face more frequent stress and have fewer forms of support – such as nearby clinics, access to healthy food, reliable transportation or safe places to exercise or socialise – to help them manage the challenges of aging. As shown in recent work on brain health in rural and underserved communities, these conditions can shape whether people have the chance to stay healthy as they age. Over time, the effects of stress tend to build up, wearing down the body's systems and shaping long-term emotional and social habits. Lifestyle changes The good news is that there are multiple things that can be done to slow or prevent dementia, and our review suggests that these can be enhanced if the role of stress is better understood. Whether you are a young, midlife or an older adult, it is not too early or too late to address the implications of stress on brain health and aging. Here are a few ways you can take direct actions to help manage your level of stress: Follow lifestyle behaviors that can improve healthy aging. These include: following a healthy diet, engaging in physical activity and getting enough sleep. Even small changes in these domains can make a big difference. Prioritise your mental health and well-being to the extent you can. Things as simple as talking about your worries, asking for support from friends and family and going outside regularly can be immensely valuable. If your doctor says that you or someone you care about should follow a new health care regimen, or suggests there are signs of cognitive impairment, ask them what support or advice they have for managing related stress. If you or a loved one feel socially isolated, consider how small shifts could make a difference. 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For example, safe and walkable neighborhoods and opportunities for social connection and lifelong learning – such as through community classes and events – have the potential to reduce stress and promote brain health. Importantly, researchers have estimated that even a modest delay in disease onset of Alzheimer's would save hundreds of thousands of dollars for every American affected. Thus, providing incentives to companies who offer stress management resources could ultimately save money as well as help people age more healthfully. In addition, stress related to the stigma around mental health and aging can discourage people from seeking support that would benefit them. Even just thinking about your risk of dementia can be stressful in itself. Things can be done about this, too. For instance, normalising the use of hearing aids and integrating reports of perceived memory and mental health issues into routine primary care and workplace wellness programs could encourage people to engage with preventive services earlier. Although research on potential biomedical treatments is ongoing and important, there is currently no cure for Alzheimer's disease. However, if interventions aimed at reducing stress were prioritised in guidelines for dementia prevention, the benefits could be far-reaching, resulting in both delayed disease onset and improved quality of life for millions of people.

Mint
4 hours ago
- Mint
Explainer: What is agro-terrorism and fusarium graminearum threat fueling the US-China tensions?
The recent arrest of a Chinese researcher and charges against another for smuggling a dangerous crop-killing fungus into the United States have brought renewed attention to the threat of agro-terrorism. At the heart of the case is Fusarium graminearum, a potent plant pathogen capable of devastating cereal crops and disrupting national food supplies. US officials allege the two researchers, one of whom worked at a University of Michigan lab, intended to conduct unauthorized research on the fungus—raising fears of deliberate attempts to compromise American agriculture. The incident, unfolding amid heightened US-China tensions and trade disputes, highlights how scientific collaboration can be exploited to target a country's most vulnerable infrastructure: its food system. What is agro-terrorism? Agro-terrorism is the intentional use of biological agents—such as plant pathogens, pests, or contaminants—to attack a country's agricultural infrastructure. It targets food production systems with the aim of causing economic devastation, food insecurity, and public panic. Agro-terrorism is attractive to hostile actors because it is low-cost, difficult to detect, and capable of triggering far-reaching economic and social damage. Why agriculture is a soft target Agriculture-based sectors are especially vulnerable. Unlike military or financial systems, farms, food processing plants, and supply chains are less protected and widely dispersed. Biological attacks on crops or livestock can go undetected for weeks and are difficult to trace back to the perpetrators. This makes agro-terrorism a potent weapon for countries or groups seeking to destabilize a rival nation. Fusarium graminearum: A potent agro-terrorism threat At the center of the current controversy is Fusarium graminearum, a fungus that causes Fusarium head blight—a disease that ravages cereal crops such as wheat, barley, maize, and rice. The fungus not only decimates yields but also produces a toxin called vomitoxin (deoxynivalenol), making the grain unsafe for human and animal consumption. According to the US Department of Agriculture, this disease causes over $1 billion in crop losses annually in the United States alone. Vomitoxin can cause vomiting, diarrhea, abdominal pain, and fever in livestock and people, further amplifying its public health impact. The case: Chinese researchers charged Two Chinese nationals, Yunqing Jian (33) and Zunyong Liu (34), have been charged by US federal prosecutors with smuggling Fusarium graminearum into the United States—without proper permits and under false pretenses. Jian, who works at the University of Michigan, is currently in US custody. Liu, her boyfriend and a researcher in China, is believed to be in China and remains at large. According to the FBI, Liu carried baggies of the fungus into the US via the Detroit airport and initially lied about them. He later admitted he intended to use them for research in a Michigan lab. Jian allegedly received Chinese government funding for similar research and has expressed loyalty to the Chinese Communist Party (CCP). US Attorney Jerome Gorgon Jr. described the smuggling as a 'national security' concern, emphasizing the CCP ties and the threat to America's food supply. Why this matters Although Fusarium graminearum already exists in the US, the unauthorised import of foreign strains is dangerous. Variants may be more virulent, pesticide-resistant, or adapted to new climates—making them harder to contain. Bringing them in without the proper biosecurity controls risks new outbreaks or genetic mutations that existing defenses can't manage. FBI Director Kash Patel warned that this could have "grave consequences... putting American lives and our economy at serious risk." He emphasised that this case illustrates how state-backed actors may attempt to infiltrate US institutions and compromise critical sectors like food security. Wider context: US-China tensions This incident comes amid deteriorating relations between Washington and Beijing. US-China trade talks stall after Geneva tariff truce Trade negotiations between the United States and China have stalled, just weeks after both sides agreed in Geneva to a 90-day cooling-off period by reducing tariffs. The agreement had seen China cut tariffs on American goods from 125% to 10%, while the U.S. proposed lowering its tariffs on Chinese imports from 145% to 30%. However, progress has faltered amid renewed tensions. U.S. President Donald Trump reignited the dispute on May 30, accusing China of 'totally violating' the Geneva deal, though he did not provide specifics. 'So much for being Mr. NICE GUY!' he wrote on social media. In response, China's Commerce Ministry denied any violations and accused Washington of making 'bogus charges' and taking 'unreasonable' actions, including export controls on AI chips and revoking Chinese student visas. The Trump administration has also recently announced a crackdown on Chinese student visas, citing national security threats. US Secretary of State Marco Rubio pledged to 'aggressively revoke' visas for Chinese students in sensitive research fields—moves Beijing has denounced as 'discriminatory.'


Time of India
6 hours ago
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Secret leprosy infected the Americas before European arrival
Representative image (AP) What to know: Leprosy is one of the oldest human diseases and originated in Eurasia or Africa A new study has found a different species of leprosy-causing bacteria existed in the Americas before European settlement. Scientists once believed Europeans brought leprosy to the American continents via infection from the bacterial species Mycobacterium leprae. But now a new study published in the journal Science reveals that a different form of leprosy-causing bacteria — called Mycobacterium lepromatosis — was already circulating in the Americas for at least one thousand years. Leprosy was therefore already affecting American indigenous peoples well before European colonization. Mycobacterium lepromatosis in America The study authors analyzed more than 800 samples taken from ancient remains in Canada and Argentina. The genomes of the bacteria taken from the samples were reconstructed, analyzed, and dated. Comparisons between the samples showed the bacterial genomes were of distinctive branches of the lepromatosis species at each end of the continent. However, they remained genetically similar. This suggested that the bacteria species had spread rapidly across the Americas, probably covering the landmass in just a few hundred years. Leprosy is caused by two bacteria species, not one. Leprosy is an ancient disease Leprosy has been infecting humans for thousands of years. The disease presents as multiple numbing skin lesions. If left untreated, it can result in nerve damage, muscle weakness, paralysis and blindness. Today, leprosy can be treated with antibiotics, but ancient sufferers weren't so fortunate. Skeletal records from 2,000BCE have been found in India with traces of the disease caused by Mycobacterium leprae. These are matched by written records of leprosy cases in ancient literature from Indian, Chinese and African civilizations, as well as stories in the Abrahamic religions. Often, these ancient descriptions associated the affliction with stigmas of immorality or ritual uncleanliness. But in 1874 the Norwegian doctor Gerhard Armauer Hansen discovered that leprosy was caused by the microscopic organism Mycobacterium leprae. In 2008, doctors in Mexico found another leprosy-causing bacteria species — Mycobacterium lepromatosis — in a leprosy patient. Before this, it was believed leprae was the only pathogen capable of causing the disease. Now both forms of the bacteria are known to cause it. Europeans spread diseases, leprosy too Nicolas Rascovan, head of the Microbial Paleogenomics Unit at the Pasteur Institut in France led the investigation. He and his colleagues estimate lepromatosis and leprae diverged from a common ancestor about one million years ago. "The diversification happened probably independent of humans," Rascovan told DW. The arrival of the first European fleets to the Americas in 1492 marked the introduction of new diseases to the Americas. Leprosy — in the form of the leprae bacterium — was among them. Archaeological evidence has shown leprae migrated with human groups out of Africa and into Asia and Europe around 40,000 years ago. Its introduction to the Americas, along with other diseases, by Europeans devastated indigenous communities and intensified the impact of pathogens that were already circulating before colonization. The discovery of lepromatosis' longer history on the continent further highlights the diversity of pathogens and their complex relationship with humans throughout history, said Rascovan. "Europeans had a very important impact by bringing this new species [leprae] that was absent in America," he said. Leprosy track and trace Rascovan hopes the presence of lepromatosis in the archeological record will improve understanding of pre-colonial disease, especially in the absence of written records. In addition, the study helps understand modern cases of leprosy, especially how it could make the jump from animals like squirrels to humans. "Our work is giving the kick start to really start analyzing, monitoring and understanding the diversity of natural reservoirs [disease carriers]," said Rascovan. He said monitoring the disease and preventing spillovers from animals to humans should be a priority. The disease is still prevalent today — 200,000 cases are reported each year globally. Brazil, India and Indonesia still report more than 10,000 new cases annually, according to WHO data.