EP241: A Refresher On Stress

Welcome to my podcast. I am Doctor Warrick Bishop, and I want to help you to live as well as possible for as long as possible. I’m a practising cardiologist, best-selling author, keynote speaker, and the creator of The Healthy Heart Network. I have over 20 years as a specialist cardiologist and a private practice of over 10,000 patients. EP241: A Refresher On Stress - Summary Dr. Warwick Bishop, a cardiologist and CEO of the Healthy Heart Network, hosts this episode focused on understanding stress, depression, and anxiety and their profound impact on cardiovascular and overall health. With heart disease claiming one life every 20 minutes in Australia and affecting over 9 million people globally, Dr. Bishop emphasizes that most of these cases could be preventable with proper health knowledge. This episode serves as a refresher on how chronic stress mechanisms work in the body and practical strategies to manage them. Key Takeaways: Depression and anxiety are strongly linked to increased risk of major cardiovascular events, with people suffering from these conditions experiencing worse cardiovascular outcomes. The body has two main stress response systems: the nervous system (sympathetic), which directly tightens blood vessels and increases heart rate, and the hormonal system, which releases adrenaline and cortisol. Chronic stress hormones (adrenaline and cortisol) lead to fluid retention, elevated blood pressure, insulin resistance, and inflammation when sustained over long periods. The human body was evolutionarily designed for short, acute stress responses (like a gazelle fleeing a predator for minutes), not prolonged stress lasting hours, days, or weeks as occurs in modern life. Modern lifestyle stressors—alarm clocks, traffic, work deadlines—keep the sympathetic nervous system continuously elevated, preventing the body from returning to its natural resting state. Chronic stress can impact gene expression through epigenetics, potentially contributing to abnormal cellular division and cancer formation by altering how DNA is converted into proteins. Exercise performed four to six times per week has been shown to be as effective as antidepressants in managing mood and rebalancing the body's energy system. Meditation and mindfulness practices can help reduce stress and anxiety, with the speaker noting personal benefits from recently embracing meditation. Most stress has negative long-term consequences that are difficult to predict, making stress management essential for long-term health. Awareness of your stress levels and consultation with loved ones about your wellbeing are important first steps in managing chronic stress effectively.