← The Peter Attia Drive

#144 - Phil Maffetone: Optimizing health and performance through maximal aerobic function

Jan 11, 2021 1h 22m 17 insights
<div> <p>Phil Maffetone is an author, health practitioner, and coach with decades of experience helping everyone from amateurs to world-class athletes optimize their health and performance. In this episode, Phil explains the importance of developing the aerobic system, defines maximum aerobic function (MAF), and explains how to determine your MAF heart rate. He then demonstrates how to integrate that into a training protocol which is designed to help people move faster at a sub maximum heart rate and increase fat utilization as the primary source of fuel—emphasizing the importance of nutrition on one's capacity to oxidize fat. Phil also extracts training insights from the amazing feats of world-class marathoners, explores the impact of a low-carb diet on one's capacity for high intensity exercise and anaerobic performance, and explains the downstream effects of being "overfat."</p> </div> <div> <div> <div> <div> <div> <div> <div> <div> <p> </p> </div> </div> </div> </div> </div> </div> </div> </div> <p>We discuss:</p> <p> </p> <ul type="disc"> <li>Phil's background in running, and training insights from a six-day race (2:30);</li> <li>The difference between being "fit" and being "healthy" (11:00);</li> <li>Defining the aerobic and anaerobic systems, and why VO2 max doesn't predict performance (18:15);</li> <li>Defining maximum aerobic function (MAF), determining your MAF heart rate with Phil's 180 Formula, and why a strong aerobic system is crucial to health and performance (24:00);</li> <li>Using the MAF test to track and improve your aerobic fitness (37:30);</li> <li>How increasing your sub-max pace at a given heart rate can increase your maximum pace (40:00);</li> <li>The impact of nutrition on one's ability to use fat as fuel while exercising (43:00);</li> <li>Phil's nutritional approach with patients, the concept of "carbohydrate intolerance" (51:45);</li> <li>Assessing the impact of a low-carb diet on high intensity exercise and anaerobic performance (58:00);</li> <li>Extracting insights from world-class marathoners (1:04:45);</li> <li>How being "overfat" affects health and performance, and ways to decrease excess body fat (1:13:30); and</li> <li>More.</li> </ul> <p>Learn more: <a href="https://peterattiamd.com/">https://peterattiamd.com/</a><br /> <br /> Show notes page for this episode: <a href="http://peterattiamd.com/PhilMaffetone">http://peterattiamd.com/PhilMaffetone</a><br /> <br /> Subscribe to receive exclusive subscriber-only content: <a href="https://peterattiamd.com/subscribe/">https://peterattiamd.com/subscribe/</a><br /> <br /> Sign up to receive Peter's email newsletter: <a href="https://peterattiamd.com/newsletter/">https://peterattiamd.com/newsletter/</a><br /> <br /> Connect with Peter on <a href="http://Facebook.com/PeterAttiaMD"><u>Faceboo</u></a><u>k</u> | <a href="http://Twitter.com/PeterAttiaMD"><u>Twitter</u></a> | <a href="http://Instagram.com/PeterAttiaMD"><u>Instagram</u></a>.</p>
Actionable Insights

1. Maximize Aerobic Function (MAF)

Calculate your maximum aerobic function (MAF) heart rate using the ‘180 minus age’ formula, then adjust it based on individual health and fitness factors (e.g., subtract 10 for illness/medication, subtract 5 for allergies/over-fat, add 5 for competitive athletes) to guide your aerobic training.

2. Train at Your MAF Heart Rate

Consistently train at your calculated MAF heart rate to develop your aerobic system and increase fat burning, aiming to run or walk faster at the same low heart rate over time. Avoid exceeding this rate to prevent drifting into an anaerobic state.

3. Track Progress with MAF Test

Regularly perform the MAF test by tracking your pace at your MAF heart rate; improved speed at the same heart rate indicates enhanced aerobic fitness and fat-burning efficiency, serving as a functional indicator of health.

4. Assess Carb Tolerance (Two-Week Test)

Conduct a ’two-week test’ by eliminating junk food and significantly reducing natural carbohydrates (e.g., lentils, beans, rice, fruits, fruit juice) to assess your body’s carbohydrate tolerance and observe improvements in symptoms like post-meal fatigue.

5. Individualize Diet Post-Test

After the two-week low-carb test, gradually reintroduce specific carbohydrates and monitor your body’s response to identify your optimal intake and understand what it feels like to consume too much.

6. Prioritize Health Over Fitness

Recognize that being ‘fit’ (e.g., completing a marathon) does not automatically mean being ‘healthy’; strive for a balanced approach where health is the foundation, regardless of your activity level.

7. Focus on Fat Burning

Develop your aerobic system by training at intensities that promote fat burning, as this provides more sustainable energy and contributes to overall health and endurance performance.

8. Reduce Training Volume

If you are over-trained, experiencing burnout, or have significant life stressors, reduce your overall training volume and intensity, as doing less can often lead to better performance and recovery.

9. Avoid Excessive HIIT

Limit high-intensity interval training if your primary goal is to improve your MAF test results (running faster at a low heart rate), as it can hinder the development of your foundational aerobic system.

10. Improve Sub-Max Performance

Enhance your sub-maximal aerobic performance (e.g., increasing speed at your MAF heart rate) because this directly predicts and improves your maximum performance in races, even for shorter distances.

11. Focus on Body Fat, Not Weight

Shift your focus from overall body weight to reducing excess body fat (‘over fat’), as excess adipose tissue is a key driver of chronic diseases, impaired immune function, and physical injuries.

12. Holistic Health Approach

Adopt a holistic lifestyle approach to health by prioritizing proper nutrition (avoiding junk food), regular low-intensity exercise (like walking), and effective stress management, while also avoiding smoking and excessive alcohol.

13. Start with Walking

For beginners or those seeking general health improvements, simply start walking regularly, as this low-intensity activity provides significant fat-burning benefits and is a foundational step towards better health.

14. Six-Day Race Strategy

For ultra-endurance races, start by walking, gradually increase intensity to a low, maximum aerobic heart rate, incorporate cool-downs, and take short breaks, potentially experimenting with extended periods without sleep followed by longer recovery.

15. Individualize Protocols

As a coach or individual, tailor training and health protocols by collaborating on preferences and goals, always ensuring that the athlete’s long-term health is not compromised for short-term performance gains.

16. Listen to Your Body

Develop your intuition to recognize when your body is signaling that you’ve consumed too much carbohydrate or pushed too hard in training, allowing for proactive adjustments.

17. Insight 17

Do not solely rely on VO2 max as a predictor of endurance performance or health, as research indicates it doesn’t directly correlate with race finish times and can be a misleading metric.