Tuesday, May 20, 2025

 

The Lancet: Globally the health of adolescents is at a tipping point; action needed to tackle rising threats to young people’s health and wellbeing



The Lancet


  • New analysis indicates that without targeted action by 2030 at least half of the world’s adolescents (over 1 billion) will still live in countries where they are at risk of experiencing poor health across many indicators, including mental health and overweight.  
  • Over the past decade, progress in adolescent health and wellbeing has been mixed and uneven. While global rates of smoking and alcohol use have declined and educational participation - especially among young women - has increased, obesity-related diseases and mental health disorders are rising in all regions.
  • The second Lancet Commission on adolescent health and wellbeing highlights that today's adolescents, the first generation to grow up under harsher climate conditions and the pervasive presence of digital technologies, disproportionately face emerging global health threats.
  • Adolescents in low- and middle-income countries represent over a quarter of the population and bear a disproportionate share of the global disease burden (9.1%) - yet receive just 2.4% of global development aid. 
  • Adolescents and youth from over 36 countries were central to the Commission. They call for young people to claim their right to be involved in shaping policies, in research, and in advancing solutions that directly affect their lives. 


By 2030, there will still be over 1 billion of the world’s adolescents (aged 10-24 years) living in countries where preventable and treatable health problems like HIV/AIDS, early pregnancy, unsafe sex, depression, poor nutrition and injury collectively threaten the health and wellbeing of adolescents, suggests a new analysis from the second Lancet Commission on adolescent health and wellbeing.

Commission co-chair, Professor Sarah Baird, George Washington University (USA) says, “The health and wellbeing of adolescents worldwide is at a tipping point, with mixed progress observed over the past three decades. Whilst tobacco and alcohol use has declined and participation in secondary and tertiary education has increased, overweight and obesity have risen by up to eight-fold in some countries in Africa and Asia over the past three decades, and there is a growing burden of poor adolescent mental health globally. Additionally, the challenges faced by the world’s adolescents are at risk of being exacerbated by emerging global issues including climate change, world conflicts and a rapid transition to a more digital world.

“Investing in the health and wellbeing of young people is crucial for safeguarding our collective future. We must prioritise investment in adolescent health and wellbeing through initiatives including those that strengthen schools to promote health and wellbeing and to ensure universal access to healthcare for adolescents. Furthermore, adolescent engagement and activism must be central to creating the social and community changes we need to foster a more just society and create a healthier planet with more opportunities for everyone.”

Insufficient and uneven progress
 
A decade since the first Lancet Commission on adolescent health and wellbeing published in 2016 [1], there have been global improvements in education, and in reducing global rates of smoking and alcohol use. However, across many areas of adolescent health, progress has been undermined by the COVID-19 pandemic and a chronic lack of funding.
 
In a novel analysis using data from the 2021 Global Burden of Disease study [2], the Commission estimates that there were nearly 1.1 billion adolescents living in countries where preventable and treatable health problems like HIV/AIDS, early pregnancy, unsafe sex, depression, poor nutrition and injury remain a daily threat to their health, wellbeing, and life chances (which the Commission terms multi-burden countries). [3] 
 
This compares to just under 1 billion adolescents living in multi-burden countries in 2016 indicating, alongside population growth, a lack of progress in addressing adolescent health. New projections suggest that, without political will, policy initiatives and financial investments, there will still be more than 1 billion adolescents living in multi-burden countries in 2030.

Limited progress is evident in several critical areas impacting adolescents. The Commission estimates that nearly one-third of adolescent girls will be anaemic globally by 2030, highlighting inadequate efforts to tackle this issue. Anaemia can cause fatigue,hinder growth and cognitive development and, in extreme cases, lead to organ damage, making it crucial to address for the wellbeing of girls.

Similarly, adolescent mental health has seen a significant decline over the past three decades in countries with available data, a trend exacerbated by the COVID-19 pandemic. In 2030, the Commission projects 42 million years of healthy life will be lost to mental disorders or suicide (2 million more than in 2015). 
 
Additional projections indicate that one-third of adolescents in high-income countries, Latin America, and the Middle East will be overweight by 2030, underscoring the shortcomings in combating adolescent obesity. In 2030, the Commission projects 464 million adolescents globally will be overweight or obese (143 million more than in 2015).

Commission co-chair, Professor Alex Ezeh, Drexel University (USA) says, “Demographic shifts will continue to drive global progress or lack thereof in adolescent health and wellbeing. Africa’s share of global adolescents will increase from under 25% currently to more than 46% by 2100. Consequently, progress in improving the health and wellbeing of adolescents in Africa will increasingly determine progress in improving the health and wellbeing of adolescents globally. This calls for targeted attention to the needs of adolescents in Africa.”

New threats to adolescent health

The Commission identifies several significant new threats to adolescent health, emphasising that young people are navigating a rapidly changing world. Emerging challenges, such as climate change and the shift towards a more digital world, are expected to have a profound impact on young people’s future health and wellbeing.

Today’s adolescents are the first generation who will live their entire life with the average annual global temperature that has consistently been 0·5oC higher than pre-industrial levels. And by 2100, 1.9 billion adolescents will live in a world that is expected to warm around 2.8oC above pre-industrial times, bringing catastrophic risks for their health such as heat-related illnesses, reduction in food and water quality and availability, and a rise in mental health conditions related to climate events.

The Commission undertook a new systematic review to identify how climate change affects adolescent mental health. The review found that both quick acting climate disasters such as hurricanes and slower acting effects such as chronic food insecurity contribute to mental health conditions in adolescents such as post-traumatic stress disorder, anxiety and depression. [4]
 
Commissioner Dr Aaron Jenkins, University of Sydney (Australia), says, “I am profoundly encouraged by our Second Lancet Commission on adolescent health and wellbeing, which embraces the ecological foundations of human wellbeing—highlighting biodiversity, environmental integrity, and climate as pivotal determinants of adolescent health. This holistic approach underscores that safeguarding our planet’s health is inseparable from nurturing the potential and resilience of young people. For the first time, we are identifying and encouraging interventions that simultaneously advance adolescent health, ecological integrity, biodiversity conservation, climate change mitigation, and social justice. This integrative co-benefit strategy not only addresses the multifaceted challenges faced by today’s youth but also paves the way for a sustainable and equitable future.”
 
Additionally, the Commission highlights how the digital transition offers adolescents new opportunities for social interaction, education, employment, and health promotion. However, many key social and emotional experiences now occur online, raising concerns about potential harm to their development and wellbeing. While the impact of the digital world, especially social media, on adolescent mental health remains highly debated with limited causal evidence, there is a need to balance early protective actions with avoiding unintended harm by overly restricting digital access.
 
Actions to address adolescent health and wellbeing
 
The Commission highlights that current funding for adolescent health and wellbeing is not proportionate with the magnitude of the challenge nor targeted to areas of greatest need. 
 
An analysis of funding undertaken by the Commission finds adolescent health and wellbeing makes up only 2.4% of global aid, despite adolescents being 25% of the world population and making up 9% of the total burden of disease. [5] 
 
The Commission’s analyses of the returns on investments in adolescence show they are on par with investments in children aged 0–9 years, and that investments in children and adolescents are associated with better returns than investments in adults. The Commission’s exploration of the challenges facing the field of adolescent health suggest that investment is hampered by the absence of global and national leadership, governance and accountability for adolescent health and wellbeing, among many other factors. 
 
This is the first global Commission to prioritise and embed meaningful adolescent and youth engagement at every stage, co-led by ten diverse Youth Commissioners - aged 23 to 35 - spanning academia, civil society, and multilateral organisations. Their lived experiences, research expertise and leadership shaped the Commission, while Youth Solution Labs run by the Commission engaged over 200 adolescents across 36 countries to identify key priorities and develop actionable recommendations.
 
Youth Commissioner Dr Shakira Choonara, says, "Young people are navigating a rapidly changing world, and through this Commission we’ve heard the diverse and alarming concerns adolescents have about their health and wellbeing. However, there are also opportunities—and we've seen firsthand and through the Commission findings how adolescents are already stepping up as active citizens and powerful agents of change, from leading advocacy and activism to co-designing policies that shape the future of human health and planetary health. I am deeply inspired by the change youth leaders are bringing to their communities and to the global landscape. Investing in and engaging with our generation will build a healthier, more empowered, and better-equipped generation of future leaders." 

Quotes from authors cannot be found in the text of the Commission but have been supplied for the press release. 
 
References:
 
[1] https://www.thelancet.com/commissions/adolescent-health-and-wellbeing 
[2] https://ghdx.healthdata.org/gbd-2021 
[3] Multi-burden countries are defined by the Commission as countries where there are more than 2,500 Disability Adjusted Life Years in adolescents per 100,000 due to communicable, maternal or nutritional diseases.
[4] See appendix 12 for the systematic review on climate change and adolescent wellbeing
[5] See appendix 7 for the analysis of development assistance for health
 
The labels have been added to this press release as part of a project run by the Academy of Medical Sciences seeking to improve the communication of evidence. For more information, please see: http://www.sciencemediacentre.org/wp-content/uploads/2018/01/AMS-press-release-labelling-system-GUIDANCE.pd

IF YOU WISH TO PROVIDE A LINK FOR YOUR READERS, PLEASE USE THE FOLLOWING, WHICH WILL HAVE THE NEW COMMISSION ADDED AT THE TIME THE EMBARGO LIFTS: https://www.thelancet.com/commissions-do/adolescent-health-wellbeing

Funding: The Commission received funding from the Gates Foundation, Human Sciences Research Council, FIA Foundation, and Exemplars in Global Health. 

 

On the origin (and fate) of plants that never bloom]



Kobe University

250521-Suetsugu-Nonblooming-Illustration 

image: 

A Kobe University research team found that two species of self-pollinating orchids with unopened flowers each arose from insect-pollinated species that already have a very low degree of genetic variation in this geographic region. The variation is so low, in fact, that even though pollen might get transported from one plant to the next, it’s nearly identical to self-pollination. Lead author SUETSUGU Kenji explains, “Our findings show that for the orchid species with open flowers, the real genetic payoff for outcrossing might be marginal, giving the self-pollinating orchids, which are more successful at producing fruit, an evolutionary edge.”

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Credit: ANSAI Shun, SUETSUGU Kenji, KANEKO Shingo






Plants that reproduce exclusively by self-pollination arise from populations with extremely low diversity to begin with. The Kobe University research not only adds a facet to possible evolutionary strategies, but also lends weight to Darwin’s suspicion that this strategy might be a path to extinction.

Charles Darwin once remarked, “It is hardly an exaggeration to say that Nature tells us, in the most emphatic manner, that she abhors perpetual self-fertilization.” And yet, Kobe University botanist SUETSUGU Kenji knows of a few islands in Japan where orchids reproduce without ever opening their flowers. He says: “I’ve long been captivated by Darwin’s skepticism about plants that rely entirely on self-pollination. When I found those non-blooming orchids, I felt this was a perfect chance to directly revisit this issue. The apparent defiance of evolutionary common sense made me wonder what precise conditions — both environmental and genetic — would allow a purely self-pollinating lifestyle to emerge, let alone persist.”

On the Northern Ryukyu Islands of Kuroshima, Takeshima and Yakushima exist the only wild populations of plants known to reproduce solely by self-pollination. “Our group spent over ten years working with local plant enthusiasts, monitoring more than a hundred individual plants across several islands, so we can say with certainty that these orchids never open their flowers in their natural habitats,” explains Suetsugu. He and his team decided to subject these populations to genetic analysis that can detect minute differences even between closely related individuals, which allowed them to track gene flow and relatedness.

In the journal Proceedings of the Royal Society B, the Kobe University-led team now reports that the extreme genetic uniformity between the plants in each species proves that they are truly purely self-pollinating. In addition, they also found that the two species each arose from insect-pollinated species that already have a very low degree of genetic variation in this geographic region. The variation is so low, in fact, that even though pollen might get transported from one plant to the next, it’s nearly identical to self-pollination.

This is only made worse by another observation Suetsugu made: The cross-pollinating relatives on these islands rely on fruit flies with limited flight ability. The animals thus only pollinate, if they pollinate the plants at all, flowers of the same plant or of those that live very close by, even further reducing the benefit of insect pollination. Suetsugu explains: “Darwin’s statement was motivated by the idea that a purely self-pollinating lineage would accumulate harmful mutations and eventually face an evolutionary dead end. Yet our findings show that for the relative species with open flowers, the real genetic payoff for outcrossing might be marginal, giving the self-pollinating orchids, which are more successful at producing fruit, an evolutionary edge.”

As it turns out, Darwin’s skepticism might not have been unfounded. Another result of the Kobe University study is that even with conservative estimates, these self-pollinating species are at most 2,000 years old. Given that there are no other known examples of purely self-pollinating plants in the wild, such species might be ephemeral. “The fact that these orchids truly never outcross raises intriguing questions about their long-term viability, especially under pressures like habitat fragmentation and climate change,” says Suetsugu. He nevertheless is proud of his team’s findings, saying, “Each new data point, each newly described species, brings me closer to grasping the full spectrum of evolutionary possibilities.”

This research was funded by the Japan Society for the Promotion of Science (grants JP15K18470, JP17H05016 and JP18K06408), the Japan Science and Technology Agency (grant JPMJPR21D6), the Ministry of the Environment, Japan (grant 4-2001) and the Alexander von Humboldt Foundation. It was conducted in collaboration with researchers from Tohoku University, Osaka Metropolitan University, Fukushima University, and the National Institute of Genetics.

Kobe University is a national university with roots dating back to the Kobe Higher Commercial School founded in 1902. It is now one of Japan’s leading comprehensive research universities with nearly 16,000 students and nearly 1,700 faculty in 11 faculties and schools and 15 graduate schools. Combining the social and natural sciences to cultivate leaders with an interdisciplinary perspective, Kobe University creates knowledge and fosters innovation to address society’s challenges.

On the Northern Ryukyu Islands of Kuroshima, Takeshima and Yakushima exist the only wild populations of plants known to reproduce solely by self-pollination (pictured: Gastrodia kuroshimensis). “Our group spent over ten years working with local plant enthusiasts, monitoring more than a hundred individual plants across several islands, so we can say with certainty that these orchids never open their flowers in their natural habitats,” explains Kobe University botanist SUETSUGU Kenji.

Credit

YAMASHITA Hiroaki

 

Male bodybuilders face high risk of sudden cardiac death, especially those who compete professionally





European Society of Cardiology





Sudden cardiac death is responsible for an unusually high proportion of deaths in male bodybuilders worldwide with the highest risk among professional bodybuilders, according to research published in the European Heart Journal [1] today (Wednesday).

 

Sudden cardiac death is when someone dies suddenly and unexpectedly due to a problem with their heart. It is generally rare in young and apparently healthy individuals, but it is often linked to underlying heart conditions.

 

Researchers say their findings highlight the health risks associated with competitive bodybuilding and suggest the need for greater awareness, preventive strategies and policy changes within this community.

 

The study was led by Dr Marco Vecchiato from the University of Padova, Italy. He said: “As a sports and exercise physician, I have come close to the bodybuilding world, and this has given me the opportunity to see not only its many positive aspects, such as the promotion of fitness and self-discipline, but also some of the challenges and risks that are inherently part of this discipline.

 

“I’ve seen a growing number of reports of premature deaths among people involved in bodybuilding and fitness. These tragic events, often affecting young and apparently healthy athletes, highlight a gap in our understanding of the long-term health risks associated with competitive bodybuilding. So far, no study has reported the incidence of death and sudden death within this sporting discipline.”

 

Dr Vecchiato and his colleagues gathered the names of 20,286 male bodybuilders from the official competition records and from an unofficial online database. All the men had participated in at least one International Fitness and Bodybuilding Federation event between 2005 and 2020.

 

The researchers then searched for reports of deaths of any of these named competitors in five different languages across different web sources including official media reports, social media, bodybuilding forums and blogs. Any reported deaths were then cross-referenced using multiple sources and these reports were verified and analysed by two clinicians to establish, as far as possible, the cause of death.

 

The researchers found 121 deaths among the men, with the average age at death of 45 years. Sudden cardiac deaths accounted for 38% of these.  The risk of sudden cardiac death was higher among professional bodybuilders, with a more than fivefold increase compared to amateurs.

 

In the few autopsy reports that were available, common findings included thickening or enlargement of the heart and, in some cases, coronary artery disease. In some cases, toxicological analyses and publicly available reports revealed abuse of anabolic substances.

 

Dr Vecchiato said: “Our findings show that the risk of death among male bodybuilders is considerably high. Professional athletes had a markedly higher incidence of sudden cardiac death, suggesting that the level of competition might contribute to this increased risk.

 

“Bodybuilding involves several practices that could have an impact on health, such as extreme strength training, rapid weight loss strategies including severe dietary restrictions and dehydration, as well as the widespread use of different performance-enhancing substances. These approaches can place significant strain on the cardiovascular system, increase the risk of irregular heart rhythm, and may lead to structural heart changes over time.

 

“The risk may be greater for professional bodybuilders because they are more likely to engage intensively in these practices over prolonged periods and may experience higher competitive pressure to achieve extreme physiques.

 

“For bodybuilders, the message is clear: while striving for physical excellence is admirable, the pursuit of extreme body transformation at any cost can carry significant health risks, particularly for the heart. Awareness of these risks should encourage safer training practices, improved medical supervision, and a different cultural approach that firmly rejects the use of performance enhancing substances.

 

“For clinicians, our findings suggest the importance of proactive cardiovascular screening and counselling in this population, even in young and apparently healthy athletes. Based on this data, the medical associations cannot ignore this health problem anymore and should collaborate with the respective federations and policy makers to promote safer participation. Particularly as the approach of famous athletes can also influence many other people who are engaged in strength training in gyms around the world.

 

“For policy makers and sports organisations, the study underlines the need for a cultural shift in bodybuilding, including stronger anti-doping measures, education campaigns about the risks of drug abuse and certain sport-related practices, and possibly the development of specific health surveillance programmes.

 

“More broadly, the research challenges the idea that appearance alone is an indicator of health and highlights the hidden risks that can exist behind even the most sculpted physiques. However, our findings are not an indictment of strength training or the fitness culture in general. On the contrary, regular physical activity and strength training can be extremely beneficial for health, quality of life and mortality risk.”

 

Around 15% of deaths were categorised as ‘sudden traumatic deaths’, including car crashes, suicides, murders and overdoses. “These findings underline the need to address the psychological impact of bodybuilding culture. These mental health challenges, sometimes worsen with substance abuse and can elevate the risk of impulsive or self-destructive behaviours,” Dr Vecchiato added.

 

The researchers focused on male bodybuilders because they represent the majority of participants at a competitive level, and so more data on men is available. However, they are working on a similar study focusing on female bodybuilders. They also plan to study deaths among bodybuilders over time, to see whether health risks have altered as practices have changed.