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Time in nature benefits children with mental health difficulties: study

At the end of a three-month period, teachers noted that the biggest changes in behaviour occurred in children with the most significant problems at the outset, including anxiety and depression, aggressivity and impulsivity, or social problems relating to interaction with their peers.

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A team of researchers from McGill and Université de Montréal’s Observatoire pour l’éducation et la santé des enfants (OPES, or observatory on children’s health and eduation), led by Sylvana Côté, found that spending two hours a week of class time in a natural environment can reduce emotional distress among 10- to 12-year-olds who had the most significant mental health problems before the program began.

The research comes on the heels of the publication of a UNICEF report pointing to the importance of green space for children’s development.

The study published in JAMA Network Open, looked at the effects of spending time in nature on the behaviour and mental health symptoms of over 500 schoolchildren across Quebec in the spring of 2023.

The researchers found that at the end of a three-month period, teachers noted that the biggest changes in behaviour occurred in children with the most significant problems at the outset, including anxiety and depression, aggressivity and impulsivity, or social problems relating to interaction with their peers.

Interviews with the teachers following the intervention also suggested that children were more calm, relaxed and attentive in class after time spent in nature.

“We found that children with higher mental health symptoms at baseline showed greater reductions in symptoms following the intervention,” says senior author Marie-Claude Geoffroy, an associate professor in the McGill Department of Psychiatry, and the Canada Research Chair in Youth Mental Health and Suicide Prevention at the Douglas Research Centre.

“This suggests that nature-based programs may offer targeted benefits for children with higher levels of mental health vulnerabilities and potentially act as an equalizer of mental health among school-age children,” added Sylvana Côté, one of the paper’s co-authors and a professor Université de Montréal’s school of public health and Canada Research Chair in the Prevention of Psychosocial and Educational Problems in Childhood.

Students from across Quebec and from a range of economic backgrounds

The research builds on earlier observational studies but is the first to use a randomized controlled trial to provide concrete information about the benefits to children of spending time in nature.

Including the members of the control group, approximately 1,000 children took part in the study. All were between the ages of 10 and 12 years and in grades five or six. They came from 33 different elementary schools in neighbourhoods representing a range of socioeconomic statuses and scattered around Quebec. All schools were within one kilometre of a park or green space. Half of the children stayed in school, while a similar number of children took part in the nature-based intervention.

“The idea for the project came up during the pandemic when people were worried about the health risks of children spending so much time inside the school each day,” said Geoffroy. “My kids and I spend lots of time in parks, so I’ve seen the benefits of spending time in nature, both for myself and for them. So, I thought maybe we can have a free and accessible intervention where school children can spend time in nature, and we can measure the effects this has on their mood and behaviour.”

To be able to measure changes in behaviour over the three-month period, students and teachers in the control group and the nature-intervention group were asked to fill out short questionnaires. These were designed to measure children’s emotional and behavioural difficulties, as well as their strengths.

Combining schooling with activities to promote mental health

During the two hours they spent in the park each week, teachers were asked to offer their regular classes in subjects such as math, languages or science. In addition, they were asked to incorporate a short 10-15-minute activity designed to promote mental health, with examples drawn from a teachers’ kit designed by the research team. The activities included things like drawing a tree or a mandala, writing haikus, mindful walking, talking about cycles of life and death in nature, and so on.

“Our results are particularly relevant for educators, policy-makers and mental health professionals seeking cost-effective and accessible ways to support vulnerable students,” added Tianna Loose, a post-doctoral fellow at Université de Montréal and the first author of the paper. “The intervention was low-cost, well-received and posed no risks, making it a promising strategy for schools with access to greenspaces.”

The researchers are hoping to follow up this study by working with teenagers to co-design an intervention in nature to improve well-being, reduce climate anxiety and increase connection to nature.

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Heart disease risk may start in the womb, study finds

Young adults whose mothers had high blood pressure during pregnancy — either pregnancy-associated hypertension, pre-eclampsia or eclampsia — had more signs of early arterial injury, higher blood pressure, higher body mass index and higher blood sugar than peers.

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A child’s future heart health may be partially shaped before they are born, reports a new Northwestern Medicine study that found pregnancy complications are linked to poorer cardiovascular health in offspring more than 20 years later.

The study found that young adults whose mothers had high blood pressure during pregnancy — either pregnancy-associated hypertension, pre-eclampsia or eclampsia — had more signs of early arterial injury, higher blood pressure, higher body mass index and higher blood sugar than peers.

The authors said the study adds to growing evidence that cardiovascular risk may be transmitted across generations through a combination of biological, environmental and behavioral factors.

“That means we must make sure people maintain good health from childhood into young adulthood, so that if or when someone becomes a parent, they pass on the best opportunity for good health to their children,” said study senior author Dr. Nilay Shah, assistant professor of medicine in the division of cardiology at Northwestern University Feinberg School of Medicine.

How the study was conducted

Shah and colleagues evaluated nearly 1,350 mother-child pairs from the Future of Families and Child Well-Being Study, which enrolled mothers and children at birth between 1998 and 2000 across 20 U.S. cities. The children were then followed into adulthood.

Using delivery hospitalization records, the Northwestern scientists first identified whether mothers experienced pregnancy complications, including high blood pressure during pregnancy, gestational diabetes (high blood sugar during pregnancy) or preterm birth (before 37 weeks of pregnancy).

The three pregnancy complications are on the rise, and affect almost one in four pregnancies in the U.S.

The research team then analyzed cardiovascular health of offspring at age 22, using blood pressure measurements, blood testing, body mass index assessments and carotid artery ultrasounds to look for signs of artery injury.

Finally, the scientists compared participants with and without exposure to each pregnancy complication and adjusted for factors like income, education, difference in birth weight and smoking during pregnancy.

Key findings

At around age 22, participants whose mothers had high blood pressure during pregnancy had:

  • Higher body mass index (+2.8 BMI points)
  • Higher diastolic blood pressure (+2.3 mm Hg)
  • Higher blood sugar levels (+0.2% HbA1c)
  • Thicker artery walls (~0.02 mm)

While the difference in artery wall thickness may seem small, the study authors said it corresponds to roughly three to five years of additional vascular aging. That means arteries looked older and less healthy than expected, which raises the risk of future heart disease.

Other pregnancy complications also showed some long-term effect:

  • Exposure to gestational diabetes was linked to worse blood pressure and some evidence of artery thickening
  • Being born preterm was associated with higher blood sugar levels

‘Most heart disease is preventable’

With pregnancy complications on the rise in the U.S., Shah said the study provides compelling evidence that improving health before and during pregnancy could help reduce heart disease risk in the next generation.

“There is evidence that both parents’ health at the time of conception and during pregnancy influences a child’s health,” he said. “So, promoting health from an early age, like exercising regularly, eating healthfully, never smoking and getting enough sleep, is not just meant for an individual, but doing so may help future generations be healthier, too.”

Shah also emphasizes that risk is not destiny.

“The good news is that most heart disease is preventable,” he said. “If you experienced high blood pressure or high blood sugar during pregnancy, or your child was born early, it does not absolutely mean that your child will have worse health as adults. But I would encourage you to pay attention now to your child’s health behaviors.

“What children learn in childhood sets the stage for their health across their lives. If you are wondering whether your children’s behaviors are healthy, or are considering making a change, please speak with your child’s pediatrician for advice and guidance.”

Other Northwestern co-authors include Emily Lam, Abigail Gauen, Dr. Sadiya Khan, Alexa Freedman and Norrina Allen.

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Viagra could hold key to halting Peyronie’s disease

Combining two widely prescribed drug classes could provide the first effective treatment for early-stage Peyronie’s disease.

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Combining two widely prescribed drug classes could provide the first effective treatment for early-stage Peyronie’s disease, according to a study published in The Journal of Sexual Medicine.

Peyronie’s disease (PD) is caused by the development of fibrotic scar tissue within the penis, leading to pain, curvature, sexual dysfunction and, in many cases, significant psychological distress. It affects an estimated 10 per cent of men during their lifetime, but despite its prevalence, treatment options are limited, particularly in the early phase of the condition.

The study, carried out by Anglia Ruskin University (ARU) and University College London Hospital (UCLH), found that combining phosphodiesterase type 5 (PDE5) inhibitors such as sildenafil (Viagra) and tadalafil (Cialis) with selective oestrogen receptor modulators (SERMs), including tamoxifen, may slow or even stop disease progression when given early.

The clinical study, carried out by Professor David Ralph of UCLH, evaluated outcomes in 133 men diagnosed with acute Peyronie’s disease who were treated with the drug combination for three months. Their results were compared with a smaller group of patients receiving standard care, which included giving vitamin E or no treatment at all. Standard care did not include surgery.

The study found 43 per cent of patients on the combination experienced an improvement in penile curvature, almost three times higher than in the standard‑care group (15 per cent).

At the start of treatment, 65 per cent of patients in the combination group reported pain during erections. After three months, that figure had fallen to just 1.5 per cent. By comparison, pain prevalence in the standard‑care group fell from 50 per cent to 27 per cent.

The clinical findings build on earlier laboratory work led by Professor Selim Cellek at ARU’s Fibrosis Research Group. Over the course of several years, Professor Cellek’s team screened 1,953 FDA‑approved drugs to identify compounds capable of blocking the transformation of fibroblasts into myofibroblasts, the key cells responsible for fibrosis. PDE5 inhibitors and SERMs emerged as particularly effective, and when used together demonstrated an effect greater than either drug alone.

Currently, there are no approved oral therapies proven to prevent early disease progression, forcing patients in the acute phase to wait until the condition stabilises before they can be offered treatments including injections or surgery.

Professor Cellek said: “Positive findings from this pilot clinical study validate our drug‑screening approach in the lab. It shows how repurposing well‑known medicines can accelerate progress in areas of unmet clinical need.

“Because both PDE5 inhibitors and SERMs are already widely used in clinical practice and have established safety profiles, the approach could be readily adoptable if confirmed in larger studies.

“These results suggest that early intervention targeting fibrosis could change how we treat Peyronie’s disease. Repurposing existing drugs may allow us to move from managing symptoms to modifying the disease itself.”

Professor David Ralph, Professor of Urology at UCLH, said: “This paper confirms the basic science research with regards to halting the progression of Peyronie’s disease. In previous papers we have noted that tamoxifen and PDE5 inhibitors inhibit the transformation of fibroblasts into myofibroblasts and therefore contraction of the plaque.

“This has now been put into clinical practice where this paper shows that when tamoxifen and a PDE5 inhibitor are combined, there is statistically less progression of the disease and improvement in curvature compared to the control arm. This is where from bench to clinical practice prevails and hopefully now a prospective clinical trial can be initiated.”

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Healthier brains may be more resilient to early Alzheimer’s disease

Maintaining good overall brain health may help reduce the impact of Alzheimer’s‑related changes on cognitive function.

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A healthy brain may help protect thinking and memory skills from the early effects of Alzheimer’s disease, a new study has found.

Dementia is currently the leading cause of death in Australia and Alzheimer’s disease is its most common form — accounting for more than 70% of cases.

Alzheimer’s is a progressive brain disease in which cognitive abilities gradually decline, leading to impaired memory and thinking skills.

However, some people maintain high levels of cognitive function even though their brains show early signs of the disease. Specifically, some older adults have Alzheimer’s‑related brain pathology, but no noticeable cognitive problems.

The study, Cognitive and Brain Reserve as Modifiers of Early Alzheimer Disease–Related Cognitive Vulnerability, was a collaboration between Murdoch University and AdventHealth, and investigated why some people remain cognitively healthy despite early Alzheimer’s‑related brain changes.

“Our study looked at why some brains were more resilient than others, and whether factors such as peoples’ education, socioeconomic status and health of their brain made a difference,” said lead author Dr Kelsey Sewell, from Murdoch University’s School of Allied Health.

“Understanding these protective factors could help us develop earlier and more targeted strategies to minimise the effects of the disease on memory and thinking skills,” she said.

The research team analysed data from more than 600 older adults in the United States aged 65 to 80, who were living independently and had no signs of dementia or memory impairment.

They used blood tests and MRI scans to assess early Alzheimer’s‑related changes and overall brain health, examined life and social factors such as years of education, income, savings and financial security, and conducted cognitive tests measuring memory, attention, processing speed, working memory and executive function.

“Our main finding was that maintaining good overall brain health may help reduce the impact of Alzheimer’s‑related changes on cognitive function,” Dr Sewell said.

“We also observed early evidence that people with a higher socioeconomic status may be less affected by Alzheimer’s-related changes when it comes to memory, although more research is needed to confirm this relationship.”

Dr Sewell said the main takeaway for the public was to do everything you can to maintain a healthy brain.

“Things like exercise, maintaining a healthy diet, sleeping well, and finding new cognitive challenges can help to maintain a healthy brain. It is never too late, or too early to start,” she said .

“These results underscore the need for coordinated action across research, policy, and industry to design environments that support healthier choices and promote brain health at a population level.”

The data collection for this study was led by researchers at AdventHealth in Orlando, Florida.

The paper, Cognitive and Brain Reserve as Modifiers of Early Alzheimer Disease–Related Cognitive Vulnerability, was published in the journal Neurology.

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