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
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
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
Recently I was asked to compare how closely WKO-modeled VO2 (VO2mod) tracks against actual measured VO2. My last few articles looked at how measured pulmonary VO2 (pVO2) tracked with HR for both continuous and intermittent workouts. So let's look again at a few VO2max intervals and see how well the modeled numbers track to measured … Continue reading VO2 Measured to Modeled
I want to look at my other favourite VO2max workout, the Rønnestad style Hard-start 30/15s VO2max workout. This was the protocol I arrived at based on Rønnestad, Seiler, Buchheit & Laursen, and others' research into optimizing interval prescription for maximizing adaptations to VO2max.