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.

Episode Summary

Introduction: Dr. Auric Bishop, a cardiologist, author, and CEO of the Healthy Heart Network, hosts this episode to discuss two important cardiovascular health topics: time-restricted eating and lipoprotein A. The episode explores scientific evidence on how different dietary and exercise interventions affect weight loss, muscle mass, and cardiovascular risk factors, with practical insights for managing heart disease prevention.

Key Takeaways:

• Time-restricted eating (such as 16:8 fasting) alone produces weight loss and improves insulin sensitivity, but results in loss of both fat and muscle mass without exercise.

• High-intensity interval training (HIIT) alone achieves greater reductions in waist circumference than time-restricted eating and importantly maintains or increases muscle mass during weight loss.

• Combining time-restricted eating with HIIT produces the greatest benefits: maximum weight loss, BMI reduction, waist circumference reduction, and nearly 40% reduction in LDL cholesterol (equivalent to low-to-intermediate-dose statins).

• HIIT preserves lean muscle mass while losing weight, which is critical for reducing frailty as people age—an advantage not seen with time-restricted eating alone.

• All three interventions (time-restricted eating alone, HIIT alone, and the combination) improved blood pressure and insulin resistance over 12 weeks in the study of overweight women.

• Lipoprotein A elevation indicates increased cardiovascular risk for most people, but it is an association rather than causation in individual cases, as demonstrated by a patient with elevated Lp(a) but zero coronary calcium.

• Coronary calcium scoring may be a valuable starting point to evaluate baseline cardiovascular risk before additional testing like Lp(a) measurement.

• Surprisingly, both time-restricted eating and HIIT groups reduced overall calorie intake during the study, despite the common expectation that exercise increases hunger.