In this episode of The Genetic Coach podcast, host Di White is joined by Chantelle Rossouw, lead genetics researcher at 3X4 Genetics with expertise in human performance, endurance, power, injury recovery, and more. The discussion delves into the fascinating world of fitness genetics and how understanding your unique DNA can personalize and enhance your fitness journey.   Key Points: Introduction to Fitness Genetics: Chantelle explains the basics of genetic code and its role in informing our fitness and performance. She describes how genetic variations, known as SNPs (single nucleotide polymorphisms), can impact our body's functions, metabolism, and energy.   Methodology and Validity in Genetic Testing: The conversation highlights the importance of scientific validity and actionable insights in genetic testing. The Darwin methodology used by 3X4 Genetics ensures that the genes tested have proven significance and that the information can be effectively applied to improve training and performance.   VO2 Max and Fitness: VO2 max, a measure of aerobic capacity, is discussed as a key indicator of both fitness and overall well-being. Research shows that VO2 max is a strong predictor of longevity and health span. Genetics play a significant role in determining baseline VO2 max and how it responds to training.   Heritability and Training Response: Chantelle explains heritability and how twin studies help distinguish the impact of genetics versus environment on VO2 max and other fitness traits. Up to 72% of baseline VO2 max and 47% of VO2 max trainability are influenced by genetics.   Tailoring Training Based on Genetics: The episode discusses how understanding your genetic profile can help tailor your training for optimal results. Whether you have a genetic predisposition for endurance or power, knowing your strengths can guide you in structuring your workouts effectively.   Implications for Elite Athletes and Everyday Individuals: Chantelle emphasizes that genetic insights are valuable for both elite athletes and everyday individuals. By aligning training with genetic predispositions, athletes can maximize performance and reduce the risk of overtraining and injury. Conclusion and Next Episode Tease: The episode wraps up with a look ahead to the next topic: genetics of recovery and injury prevention. The conversation will explore how genetic information can tailor training and recovery strategies to individual needs.   Join us next week as we dive into the genetics of recovery and injury, and discover how to tailor your training and recovery for optimal performance based on your unique genetic makeup.