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Watts Doc #25: Everesting Training and Logistics

9/9/2020

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Empirical Cycling Podcast · Watts Doc #25: Everesting Training and Preparation
In this episode we discuss the preparations for successfully Everesting, With training we discuss periodization, cadence, and bike fit, and logistic preparations include picking the right road, nutrition, gearing, and dealing with mechanical and accident risks.

Show Notes
Emma Pooley
https://www.strava.com/activities/3732201691
​
Ronan McLaughlin
https://www.strava.com/activities/3840715465

Rule set from everesting.cc
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Watts Doc #24: Listener Questions on VO2max Training and Rønnestad 30/15s

8/2/2020

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Empirical Cycling Podcast · Watts Doc #24: Listener Questions on VO2max Training and Rønnestad 30/15s
We answer your questions from the last episode on VO2max training, and, also at listener request, we look at some of last episode's Rønnestad material that got cut out.

VO2max questions include:
Aspects of position like standing and TT bikes.
Transfer of heart adaptations to normal cadence riding.
The right cadence, pacing, and terrain for intervals, rest intervals.
How Kolie would structure VO2max training for thousands of cyclists at a time.
What 30/15s (and other intermittent intervals) do better than raise VO2max.
Periodizing VO2max through a season.
What does it take to make your training adaptations your "new normal"?

Show Note
​No show notes. Thanks for listening!
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Watts Doc #23: Training Your VO2max, and Why Not Rønnestad 30/15 Intervals

7/20/2020

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Empirical Cycling Podcast · Watts Doc #23: Training Your VO2max, and Why Not Rønnestad 30/15 Intervals
This episode is the focal point of the previous VO2max episodes. We take the physiology from the previous episodes and use it to find easy ways to improve the effectiveness of any VO2max interval set. Ways to change your cadence, interval times, rest times, and interval intensities are discussed. Then we take apart a Ronnestad study on 30/15s and put it in context of VO2max and other fitness adaptations. We conclude with a training philosophy discussion on the physiology of true long term VO2max improvements.​​​​

Show Notes
Haematological rather than skeletal muscle adaptations contribute to the increase in peak oxygen uptake induced by moderate endurance training
https://pubmed.ncbi.nlm.nih.gov/26282186/

Cycling cadence alters exercise hemodynamics
https://pubmed.ncbi.nlm.nih.gov/8775571/

Superior performance improvements in elite cyclists following short-interval vs effort-matched long-interval training
​​https://pubmed.ncbi.nlm.nih.gov/31977120/
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Watts Doc #22: The Fick Equation Part 2 - Heart Adaptations For VO2max

7/14/2020

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Empirical Cycling Podcast · Watts Doc #22: The Fick Equation Part 2 - Heart Adaptations For VO2max
In the penultimate episode of the VO2max series, we dive deep into how the heart pumps and adapts, how this stress leads to increased VO2max, and why cyclists may not want to take training cues from cross-country skiing.

Show Notes
Effects of detraining on cardiovascular responses to exercise: role of blood volume
https://journals.physiology.org/doi/pdf/10.1152/jappl.1986.60.1.95

Endurance athletes' stroke volume does not plateau: major advantage is diastolic function
https://pubmed.ncbi.nlm.nih.gov/7808245/

Acute and Chronic Response to Exercise in Athletes: The “Supernormal Heart”
​​https://pubmed.ncbi.nlm.nih.gov/29022255/
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Student Union #2: East Coast Roundtable

7/13/2020

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Empirical Cycling Podcast · Student Union #2: East Coast Roundtable
Show Notes
Three collegiate conference directors and a board president walk into a bar... hypothetically. This is what it would sound like if it were at all safe to go to a bar.

We talk about our fall season cancellations, challenges faced by race promoters, predictions for spring 2021, and reactions to rumors of a Zwift nationals. In the discussion are conference directors Nick Luther of SECCC, Kyle Helson of ACCC, Kolie Moore of ECCC, and ACCC board president Laura Ann Leaton.
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Watts Doc #21: VO2max and The Most Interesting Protein In The World

7/3/2020

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Empirical Cycling Podcast · Watts Doc #21: VO2max and The Most Interesting Protein In The World
This episode explores how and why hemoglobin's function emerges from its structure, which makes it a critical component in the oxygen distribution chain. We also discuss the lungs, why VO2max isn't related to hematocrit, and vascular capacity for blood storage before diving into a classic phlebotomy study that ends with a question mark that hints at the central importance of the heart.​

Show Notes
Blood value correlations with vo2max, Figure 1
​https://pubmed.ncbi.nlm.nih.gov/30549016/

Effects of detraining on cardiovascular responses to exercise: role of blood volume
https://journals.physiology.org/doi/pdf/10.1152/jappl.1986.60.1.95
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Hemoglobin dissociation curve with right (Bohr) and left (Haldane) shifts.
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Myoglobin vs hemoglobin O2 binding curves with approximate arterial and venous O2 pressures. Image courtesy of Robert Prince.
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Watts Doc #20: The Fick Equation Part 1 - A VO2 Difference

6/1/2020

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Empirical Cycling Podcast · Watts Doc #20: The Fick Equation Part 1 - A VO2 Difference
Continuing the VO2max series, we take such a close look into the Fick equation we only cover one of its terms: the arterial-venous O2 difference.
We break apart the factors that affect diffusion of oxygen into our muscles, limiters of oxygen utilization, and whether these factors are trainable to potentially improve VO2max.

Show Notes
Determinants of endurance in well trained cyclists
https://pubmed.ncbi.nlm.nih.gov/3403447/

Hemodynamic adaptations to exercise
https://pubmed.ncbi.nlm.nih.gov/3993550/

One-legged endurance training: leg blood flow and oxygen extraction during cycling exercise
https://pubmed.ncbi.nlm.nih.gov/22059600/
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The Fick Equation:
VO2 = Cardiac Output (A-V O2 difference)

Rate of diffusion for a gas across capillary wall:
Flux=[DA(C1−C2)]/T
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Fick's first law
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Fick's second law
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Watts Doc #19: The VO2max Slow Component Explained

5/5/2020

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Empirical Cycling Podcast · Watts Doc #19: The VO2max Slow Component Explained
The slow component of vo2max is often mentioned but seldom discussed. We take a deep dive into the nature of the slow component, including thermodynamics, fiber type, and the size principle.

Show Notes
Cycling efficiency is related to the percentage of type I muscle fibers
https://www.ncbi.nlm.nih.gov/pubmed/1501563

Muscle fiber recruitment and the slow component of O2 uptake: constant work rate vs all out sprint exercise
https://www.ncbi.nlm.nih.gov/pubmed/21160059
5 Comments

Watts Doc #18: Why Everything You Know About VO2max Power Is Probably Wrong

4/25/2020

9 Comments

 
Empirical Cycling Podcast · Watts Doc #18: Why Everything You Know About VO2max Power Is Probably Wrong
In the first episode in a VO2max series, we take a deep dive into why VO2max power, or maximal aerobic power (MAP), is not a simple number that can be found in a simple test. We discuss the history, physiological, and methodological underpinnings of ramp tests and what makes them flawed, and what some people have done to try and account for these. Additional methods of MAP testing and tracking and their drawbacks are discussed. We conclude with some practical advice for ways to monitor improvements your own VO2max.

Podcast Notes
Adami study on ramp rates
https://link.springer.com/article/10.1007%2Fs00421-013-2705-9

Second study on longer ramp rates
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6066218/

Coggan blog post on estimating VO2max power
​http://www.trainingandracingwithapowermeter.com/2010/06/how-to-estimate-vo2max-using-power.html

Pinot & Grappe VO2max model
https://www.fredericgrappe.com/wp-content/uploads/2014/07/MAP.pdf
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Watts Doc #17: Why We Really Make Lactate

4/6/2020

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Lactate remains a misunderstood molecule, and popular experts still don't have a full understanding of where it comes from or why. In this episode, Kolie explains the basic biochemical context of lactate, where it really comes from, and why we make it at rest and during exercise. You will come away from this episode with a good understanding of how enzymes catalyze reactions, the importance of always making lactate, and the kinds of things that cause demand on glycolysis.​

Podcast Notes
Metabolic pathway map
http://biochemical-pathways.com/#/map/1

BRENDA database entry for human LDH
https://www.brenda-enzymes.org/enzyme.php?ecno=1.1.1.27&Suchword=&reference=&UniProtAcc=&organism%5B%5D=Homo+sapiens
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Michaelis-Menten enzyme kinetics (first order). Km is the substrate concentration at 50% maximum enzyme velocity. LDH displays lower Km for pyruvate than lactate, therefore greater specificity.
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Lactate dehydrogenase reaction and reverse reaction.
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