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.
Cycling efficiency is related to the percentage of type I muscle fibers
Muscle fiber recruitment and the slow component of O2 uptake: constant work rate vs all out sprint exercise
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.
Adami study on ramp rates
Second study on longer ramp rates
Coggan blog post on estimating VO2max power
Pinot & Grappe VO2max model
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.
Metabolic pathway map
BRENDA database entry for human LDH
Kolie and Kyle look at the relationship between FTP and VO2max. We use data from a classic paper that calls into question the validity of a long-standing testing protocol in the scientific literature, which is still in use today.
Determinants of Endurance In Well Trained Cyclists
Selection of Papers Investigating Assigning % VO2max Test Protocol
Exercise at given percentages of VO2max: heterogeneous metabolic responses between individuals.
Effect of training status and relative exercise intensity on physiological responses in men.
Is determination of exercise intensities as percentages of VO2max or HRmax adequate?
Effects of prolonged exercise at a similar percentage of maximal oxygen consumption in trained and untrained subjects.