For decades, “mental well-being” has been one of the most used, but least agreed upon, terms in mental health. Now, a landmark study led by Adelaide University and Be Well Co has brought alignment to one of mental health’s most fundamental questions—what does it actually mean to be well?

The numbers are sobering: nearly 80% of the world’s teenagers don’t get enough physical activity, according to the World Health Organization. But a new longitudinal study from Université de Montréal suggests the seeds of that sedentary lifestyle—or an active one—may be sown much earlier than anyone realized. Like when a child is 2.5 years of age.

Families with kids juggling full-time work may have been alarmed by media reporting this week, suggesting “too much” time in early childhood education and care could harm their child’s development.

Researchers have identified a new method for analyzing chest CT scans that may help physicians better understand the different forms of sarcoidosis, a complex inflammatory lung disease that affects more than 150,000 people in the United States.

Knee osteoarthritis is a complex disease that affects the whole joint, including bone, cartilage, ligaments and muscles. Osteoarthritis is a common cause of pain and movement difficulty, affecting 8.3% of people in Australia.