In this engaging discussion, Dr. Ibrahim Akubat, a sports science researcher specializing in training load and heart-rate monitoring, joins Dr. Martin Buchheit, an expert in exercise physiology. They delve into the importance of heart rate in training, revealing that even a minimal dose of around 30 minutes a week can yield significant benefits. The duo explores the evolution of heart rate metrics, the relevance of TRIMP, and how to personalize training for better performance. They also weigh the trade-offs between time-in-zone and traditional metrics, making it clear that heart rate is still key in modern coaching.