Comparing VO2 Master Pro to TrueOne 2400 – Part 2

The 5-1 assessment we run is a submaximal intermittent step test that uses NIRS and VO2 to identify physiological thresholds and training zones. I've mentioned it before. We use the general terms ‘Aerobic Threshold’ (AeT) and ‘Anaerobic Thresholds’ (AnT) for the first and second breakpoints respectively, and a polarized 3-zone model between these thresholds. The … Continue reading Comparing VO2 Master Pro to TrueOne 2400 – Part 2

Comparing VO2 Master Pro to TrueOne 2400 – Part 1

Before my recent surgery I performed a whirlwind of self-testing to answer some pressing questions before being off the bike for a while. Now that I'm in recovery mode I'm working through all the data I collected and trying to write up the more interesting findings. I was able to perform an informal pilot study … Continue reading Comparing VO2 Master Pro to TrueOne 2400 – Part 1

Modeled VO2 During Ramp Tests and Intervals

We previously looked at how measured pulmonary VO2 (pVO2) compares to WKO-modeled VO2 (VO2mod) during more-or-less constant work rate VO2max intervals. My conclusion was that modeling VO2 from power was unnecessary and would lead to less reliable and less valuable information than simply using power itself. This is mostly because VO2mod is unable to capture … Continue reading Modeled VO2 During Ramp Tests and Intervals

Metabolic Steady State – Inside vs Outside

A few weeks ago I performed a series of steady-state submaximal 30min intervals, looking at VO2 & ventilaton with the VO2 Master Pro and muscle oxygenation (SmO2) with Moxy. The first trial was inside on the trainer, followed a few days later by the second trial outside on the road. The purpose was to observe … Continue reading Metabolic Steady State – Inside vs Outside

Deriving Power from VO2 and VO2 from Power

The charts we looked at last week have some 'hidden' interesting features that I want to go into more detail on. This will get into mathematical derivations of metabolic equations, estimating Gross Efficiency, fuel utilization between fatty acids & glucose, and aerobic & anaerobic contribution to power output. This might get complicated, but it will … Continue reading Deriving Power from VO2 and VO2 from Power