Understanding Chronotypes: A Comprehensive Explanation

New research suggests your internal clock may quietly shape your risk of heart attack and stroke long before symptoms appear. For decades, sleep timing was treated as a lifestyle preference. But a massive new study hints it may be a biological risk factor. Researchers tracking more than 300,000 adults found that people who naturally stay up late classic “night owls” had a 16% higher risk of heart attack or stroke over 14 years compared with average sleepers. The data came from the UK Biobank, on