Health
Global Study Finds Sleep May Play Greater Role Than Exercise in Overall Health
A major international study has found that only a small share of people manage to meet recommended levels of both sleep and daily physical activity, raising new questions about long-standing health guidelines and how people can realistically follow them.
The research, published in the journal Communications Medicine, analysed data from wearable sleep and activity trackers from more than 70,000 people across multiple regions over a period of three and a half years. The findings show that only about 13 per cent consistently achieved the commonly promoted targets of seven to nine hours of sleep each night and at least 8,000 steps per day.
Lead author Josh Fitton, a sleep researcher at Flinders University in Australia, said the results highlight the gap between public health recommendations and everyday routines. “Only a tiny fraction of people can achieve both recommended sleep and activity levels every day, so we really need to think about how these guidelines work together and what we can do to support people to meet them in ways that fit real life,” he said.
The study revealed that people often manage to either get sufficient rest or maintain an active routine, but struggle to sustain both. Nearly 17 per cent of participants averaged fewer than seven hours of sleep and fewer than 5,000 steps daily, placing them in what researchers described as a “sedentary” group. This combination has been linked in past studies to a higher likelihood of chronic illness, weight gain and mental health issues.
Researchers noted that the data has limitations, as tracking devices tend to be more commonly used in higher-income countries, potentially skewing the global representation. Even so, the analysis uncovered a consistent pattern across participants: those who slept between six and seven hours a night recorded the highest number of steps the next day.
Senior author Danny Eckert, also from Flinders University, said the findings suggest that sleep may play a stronger role than many realise in shaping daily energy and activity levels. “Prioritising sleep could be the most effective way to boost your energy, motivation, and capacity for movement,” he said.
He added that small adjustments can help people build healthier routines. This includes reducing screen exposure before bed, maintaining regular sleep schedules and creating calming nighttime environments to support better rest.
The study’s authors say the results point to a need for clearer and more practical guidance, especially for people who struggle to balance work, family responsibilities and personal health goals. They say that for many, improving sleep habits may be the most realistic first step toward leading more active and healthier lives.
Health
Global Mental Health Cases Near 1.2 Billion as Anxiety and Depression Drive Sharp Worldwide Rise
A major global analysis has found that mental health conditions have surged to an estimated 1.2 billion people worldwide, driven largely by steep increases in anxiety and depression over the past three decades.
The findings, published in The Lancet as part of the Global Burden of Disease Study 2023, show that the number of people living with mental disorders has almost doubled since 1990, marking a 95% rise. Researchers say major depressive disorder and anxiety disorders have seen even sharper growth, increasing by 131% and 158% respectively, making them the most prevalent mental health conditions globally.
The report describes mental illnesses as widespread conditions that create long-term disability and significant human suffering. It also highlights broader consequences for economies and public services, including reduced productivity, lower workforce participation and increasing pressure on health and welfare systems.
Researchers estimate that in 2023 alone, around 620 million females and 552 million males were affected by mental health conditions. While the overall burden is rising across both sexes, the study points to notable differences in the types and prevalence of disorders.
Among women, depression and anxiety were the most commonly reported conditions, alongside higher rates of eating disorders such as anorexia nervosa and bulimia nervosa. The report links this disparity to a mix of biological, social and structural factors, including exposure to domestic violence, sexual abuse, gender inequality and reproductive health-related changes.
In contrast, neurodevelopmental and behavioural disorders, including attention deficit hyperactivity disorder (ADHD), conduct disorder and autism spectrum conditions, were more frequently diagnosed in men.
Teenagers aged 15 to 19 were identified as the group experiencing the highest mental health burden globally, raising concerns about early onset of conditions and insufficient preventive care for young people.
The study identifies several key risk factors associated with mental illness, including childhood sexual violence, bullying and intimate partner violence. These factors are strongly linked to conditions such as depression, schizophrenia, bipolar disorder and anxiety disorders. However, researchers note that such exposures have remained relatively stable over time and account for only a portion of the overall rise.
According to the authors, broader drivers are likely contributing to the increasing prevalence of mental disorders. These include genetic and biological influences, poverty, inequality, and the growing impact of global crises such as armed conflict, pandemics, natural disasters and climate-related stress.
While mental health conditions have long been a leading cause of disability worldwide, the report warns that the situation is worsening. At the same time, health systems have not expanded services at a pace matching demand.
The authors caution that the gap between rising need and limited access to care is becoming more pronounced, leaving millions without adequate treatment or support.
Health
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Health
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