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How to Use Technology in Endurance Training | #12 ft. David Mehlman

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In this episode David Mehlman and I discuss the use of technology to optimize your training and how he is using these principles to maximize his performance!

A bit about David: David Mehlman is an entrepreneur, investor, and avid endurance athlete. Throughout his career, David has worked in sell-side equity research, for a multi-billion-dollar equity hedge fund, and as an early-stage investor focused on the consumer and technology sectors. His love of data led him to explore the subject of quantitative analysis and assessment in sport and his own performance.

If you have a question or topic you want us to address, leave a comment!

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Interested in testing, courses, or other long form content check out the critical oxygen website -


0:00 - Introduction to the Podcast and Guest

0:35 - David's Marathon Journey and Introduction

2:00 - Transition to Endurance Sports and First Triathlon

6:05 - Evolution of Training and Optimization

8:00 - Philosophy of Maximizing Potential and Capacity Utilization

10:53 - Comparisons and Misconceptions in Training

15:42 - Technology's Role in Calibration and Recovery

19:33 - Importance of Easy Runs and Stress-Rest Balance

22:10 - The Impact of Stress on the Body

23:05 - Acute vs. Chronic Stress in Running

23:30 - Physiological Characteristics in Training

24:00 - The Cyclical Nature of Training

25:15 - Micro Sine Waves in Training

26:00 - The Fallacy of Predicting Race Outcomes

27:00 - Willingness vs. Physiological Adaptations

28:30 - The Fallacy of Proving Fitness in Workouts

30:00 - Input Metrics vs. Output Metrics

33:00 - Stressing the Body for Adaptations

36:00 - The Pitfalls of Chasing Output Metrics

38:00 - The Danger of Data Misinterpretation

41:00 - Data as a Guide, Not Gospel

43:01 - Heart Rate as a Crucial Internal Variable

43:46 – Importance of Heat Adaptation and External Conditions

43:52 – Adjusting Pace Based on Heart Rate

44:04 – Managing Stress and Blood Flow

44:23 – Seasonal Considerations in Workouts

45:23 – Monitoring Cardiac Drift

46:05 – Achieving Negative Cardiac Drift

47:00 – Importance of Limiter Testing

48:13 – Specificity in Training Metrics

51:38 – Personalization and Goals

53:51 – Physiological Profiling and Testing

54:25 – Running Community and Support

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