#331 ‒ Optimizing endurance performance: metrics, nutrition, lactate, and more insights from elite performers | Olav Aleksander Bu (Pt. 2)
Olav Aleksander Bu, an elite endurance coach and exercise scientist, returns to discuss his data-driven approach to training top triathletes. He delves into key performance metrics like FTP and VO2 max, optimal testing protocols, advanced nutrition strategies for high carbohydrate intake, and the future role of AI in athletic optimization.
Deep Dive Analysis
16 Topic Outline
Olav Aleksander Bu's Engineering Approach to Coaching
Defining Key Performance Metrics: FTP, Critical Power, Anaerobic Threshold
Understanding Lactate Threshold and Elite Athlete Efficiency
VO2 Max: Definition, Testing, and Optimization Methods
Common Mistakes and Best Practices for VO2 Max Testing
Advanced VO2 Max Insights and Influencing Factors
Respiratory Quotient (RQ) and Metabolic Shifts in Athletes
Triathlon Training Challenges and Performance Across Distances
Optimizing Swimming Efficiency and Biofeedback Tools
Effort Regulation in Endurance Sports: RPE, Heart Rate, Power
Lactate as Fuel and Buffering Lactic Acidosis
Physiological Differences Between Elite Athletes
Impact of Nutrition Science and Fueling Strategies
Carbohydrate and Ketone Utilization for Endurance Performance
Lessons from Olympic and Ironman Performances
Leveraging Artificial Intelligence for Training Optimization
7 Key Concepts
Functional Threshold Power (FTP)
FTP is an approximation of the highest power output an athlete can sustain for about an hour. It's typically calculated as 95% of a 20-minute all-out effort, often preceded by a 5-minute all-out effort to deplete anaerobic reserves.
Critical Power
Critical Power is derived from multiple all-out efforts of varying durations using mathematical extrapolation. It aims to distinguish between sustainable (non-severe) and unsustainable (severe) exercise states, representing the power output an athlete can maintain for a prolonged time before rapid fatigue.
Anaerobic Threshold (AT)
Anaerobic Threshold is a broad term describing the point where exercise intensity transitions from steady to unsteady, or where sustained effort becomes difficult. It's often associated with a metabolic shift where lactate production begins to exceed clearance, leading to a continuous rise in blood lactate.
Lactate Threshold (LT)
Lactate Threshold refers to the intensity at which blood lactate concentration begins to increase significantly above resting levels during incremental exercise. It's often identified by inflection points on a lactate curve, with LT1 being the first rise and LT2 (or maximum lactate steady state) being the highest intensity at which lactate remains stable.
VO2 Max
VO2 Max is defined as the maximum amount of oxygen the body can consume and utilize per minute during intense exercise. It's a key indicator of cardiorespiratory fitness and is typically measured during a graded exercise test to exhaustion.
Respiratory Quotient (RQ)
RQ is the ratio of carbon dioxide produced to oxygen consumed, reflecting the body's fuel utilization. An RQ of 1.0 indicates pure carbohydrate oxidation, while 0.7 indicates pure fat oxidation. In elite endurance athletes, RQ values at lactate threshold can be lower than commonly cited, suggesting higher fat oxidation efficiency.
Biofeedback Tools
Biofeedback tools provide real-time data on physiological parameters during exercise, such as power meters in cycling and running, or GPS for pace. These tools allow athletes to monitor and adjust their effort, technique, and efficiency, leading to more precise training and performance optimization.
9 Questions Answered
FTP is traditionally defined by Andy Coggan as 95% of the average power from a 20-minute all-out effort, usually preceded by a 5-minute all-out effort, to approximate the highest power sustainable for an hour.
FTP is a single-point approximation from a 20-minute effort, while Critical Power is a more mathematically derived metric from multiple all-out efforts, aiming to define the boundary between sustainable and unsustainable exercise intensities.
Elite endurance athletes often exhibit lower lactate concentrations at their second inflection point (LT2 or anaerobic threshold), sometimes even below two millimoles, indicating superior lactate clearance or lower production for a given power output.
Yes, by restricting breathing for a short period during an all-out effort, one can create an oxygen deficit that temporarily boosts VO2 max numbers significantly, though this doesn't reflect true fitness improvement.
To ensure reliability, maintain a standardized protocol, be well-fueled and hydrated, get proper sleep, keep the test timing consistent (due to circadian rhythm), and perform a thorough 20-minute warm-up including short, progressive efforts.
Beetroot concentrate, rich in nitrates, has shown positive effects on VO2 max in amateur athletes but not consistently in elites, who may already be optimized. Certain adaptogens, like those from pine bark extracts, have shown anecdotal potential to boost VO2 max in elites, possibly by catalyzing nitric oxide conversion.
RQ reflects the ratio of CO2 produced to O2 consumed, indicating the mix of fats and carbohydrates being burned. In elite endurance athletes, RQ values at lactate threshold can be lower (e.g., 0.92-0.94) than commonly assumed, suggesting a greater reliance on fat oxidation even at higher intensities.
Elite triathletes consume extremely high amounts of carbohydrates, often exceeding 160 grams per hour, sometimes up to 240 grams per hour, primarily through concentrated drink mixes (e.g., 12% glucose concentration) and hydrogels to maximize energy delivery and minimize gastric distress.
AI helps coaches analyze vast amounts of athlete data in real-time, identify important patterns, and make more proactive and precise individual adjustments to training programs. It acts as an 'agentic system' to process complex data, empowering coaches with PhD-level insights across multiple domains.
19 Actionable Insights
1. Integrate AI for Performance
Employ AI systems in coaching and training to enhance precision, improve consistency, and optimize training adaptations, as not utilizing AI may lead to a significant performance deficiency in the future.
2. Proactive Individualized Training with AI
Leverage AI to analyze collected data and make proactive, individualized adjustments to training programs, which can significantly improve performance for both elite athletes and amateurs.
3. Train Gut for High Carb Intake
Train your gut to tolerate and utilize high carbohydrate intake during endurance events, aiming for up to 160 grams per hour, as this is crucial for sustained performance.
4. High Volume Carb Drink Intake
To support high carbohydrate intake during endurance events, consume 1.4 to over 2 liters of a concentrated carbohydrate drink mix per hour.
5. Use Hydrogel Bicarbonate for Buffering
Mix bicarbonate tablets into a hydrogel solution (e.g., Morten product) to efficiently deliver it to the intestine, bypassing gastric issues and potentially enhancing buffering capacity.
6. Use Hydrogel Gels for Carb Intake
When consuming high amounts of carbohydrates, use hydrogel-based products that encapsulate sugar, as this reduces the perception of sweetness and can improve tolerability during long events.
7. Pure Glucose/Fructose for Fuel
During endurance races, prioritize pure glucose and fructose as carbohydrate sources, avoiding fat and protein, to maximize oxygen availability for pure propulsion.
8. Train All Physiological Capacities
Recognize that most physiological capacities, including gut tolerance for high carbohydrate intake, are extremely trainable and can be developed over time.
9. Consistent Performance Testing Protocols
When testing performance metrics like FTP or VO2 max, consistently use the same protocol each time to ensure accurate and comparable data for tracking changes.
10. Standardize VO2 Max Pre-Test
For accurate VO2 max testing, standardize your pre-test routine by eating the same way (well-fueled with carbohydrates), ensuring good hydration, and getting proper sleep.
11. Structured VO2 Max Warm-up
Implement a structured 20-minute warm-up before a VO2 max test, including easy, moderate, threshold-feel, and short V2Max efforts, to optimize test results.
12. Consistent Test Timing
Conduct VO2 max tests at a consistent time of day to account for circadian rhythm fluctuations and ensure comparable results over time.
13. Tailor Pre-Test Training Load
Use personal experience to determine the optimal training load the day before a VO2 max test, avoiding hard exercise if it causes soreness, but mimicking pre-competition routines if well-trained.
14. Standardize Fat Oxidation Tests
Separate fat oxidation testing from VO2 max tests by at least a day, performing them fasted in the morning as a sub-maximal effort to accurately measure maximum fat oxidation.
15. Utilize Running Power Meters
Consider using commercially available running power meters (e.g., Stride) to quantify metabolic power, as they provide valuable training data that correlates with oxygen consumption.
16. Prioritize RPE in Long Races
In long endurance races like Ironman, listen to your body and prioritize Rate of Perceived Exertion (RPE) over strict numerical targets (power, heart rate), especially on ‘hero days’.
17. Cost-Effective Carb Sources
For carbohydrate intake up to 60 grams per hour, use cost-effective simple carbohydrate sources like orange juice or honey mixed with water, and train your gut to tolerate them.
18. VO2 Max Test Breathing Hack
To artificially boost VO2 max numbers for a test (e.g., for a bet, not fitness), practice restricting breathing for a short time near your all-out effort to create an oxygen debt.
19. Subscribe to Peter Attia MD
Subscribe to Peter Attia MD’s premium membership for exclusive content and benefits to advance your knowledge in health and wellness.
6 Key Quotes
VO2 max is the single best metric we probably have for anything that is related to human health and performance.
Olav Aleksander Bu
As long as you do something consistently, as you keep the same protocol, you could say, okay, this one thing is the original thinking and that went into devising this kind of protocol. But I would say more importantly is rather to stay true to the principle of how you do it. So as long as you do it the same way each time, this is more important.
Olav Aleksander Bu
It's a misconception to think that anaerobic threshold means basically when you become anaerobic, because that's not the case.
Olav Aleksander Bu
The body is the same, no matter what kind of sport we do. And that's why sometimes it makes it more universally easy to understand. If we think of what kind of sport we do as a function of intensity and duration.
Olav Aleksander Bu
The reason why you have gas exchange is because we call this indirect calamity.
Olav Aleksander Bu
AI will not replace the decision making, but it will help us in terms of information. Basically extract patterns you might not otherwise be able to direct your own statistical analysis towards?
Peter Attia
3 Protocols
FTP Testing Protocol (Original Definition)
Olav Aleksander Bu- Perform a 5-minute all-out effort.
- Take a short pause.
- Perform a 20-minute all-out effort.
- Subtract 5% from the 20-minute all-out effort power to find FTP.
Standardized VO2 Max Test Warm-up
Olav Aleksander Bu- Start with 6 minutes of very easy effort (e.g., walking or soft pedaling).
- Continue with 6 minutes of slightly more effort, comfortable for a long session.
- Perform a 3-minute effort at perceived threshold intensity.
- Do 2-3 short efforts (10-15 seconds) progressively towards VO2 max, with equal rest in between.
- Return to very short, easy efforts for a total warm-up of approximately 20 minutes.
- Take a short toilet break or sip water, ensuring not to cool down too much before the test.
Morton Bicarbonate Hydrogel Preparation
Olav Aleksander Bu- Add water to the dry hydrogel mix in a sachet.
- Mix the bicarbonate tablets into the formed hydrogel.
- Whisk the mixture to ensure proper encapsulation and delivery.