Vo2Max and Heart Health – A Single Ride Following Dr. Paddy Barrett’s Formula

Vo2Max and Heart Health Correlation With DFAA-1 and other Metrics I recently stumbled across a Substack post by Dr. Paddy Barrett that explains how Vo2Max is impacted by low intensity exercise. While I had not known about Dr. Barrett previously, when I read his history and other posts, I became intrigued. I think he’s a […]
The Physiological Perspective of Four Separate 8-Minute Intervals

8-Minute Intervals At “Threshold”… In late November of 2024, I was able to perform an interval session on my indoor trainer and bike with my clients. The workout comprised of four separate 8-minute intervals. We used the VQ Velocity app, and I recorded each interval as a separate file while wearing my Vo2Master Gas Exchange […]
Vo2 at Threshold

Vo2 at Threshold – Affirming Outdoor Power at Threshold In my last blog post, I mentioned that for my best 10-minute effort while climbing a trail on a mountain bike, my Vo2 at Threshold read as roughly 55ml/kg/min. I also believed that my Vo2Max was roughly 62ml/kg/min. I was curious to see if these values […]
Vo2Master Vo2Max Value Affirms Garmin Vo2Max Estimator
Vo2Master’s Vo2Max Value Was 98% Consistent with Garmin In May of this year, I wrote a post about the Garmin Vo2Max Calculator. In July, I was able to test my Vo2Max at OBC Headquarters, to compare values. I performed a Graded Exercise Test, using the Vo2Master app. This app, on a cell phone, trapped data […]
Vo2Max On Garmin Connect and the Garmin 1040
Vo2Max Calculations Show Cardio-Vascular Changes Vo2max is a fitness and health measurement that is defined as, “The Maximal Volume of Oxygen that can be consumed by a person during physical exertion.” I’ve discussed Vo2max in the past, and I even own a Vo2Master assessment device, for testing and training purposes. Garmin Connect uses information collected […]
Fitness HRV software Release 0.17
Fitness HRV Now Includes Moxy SmO2 Values My work with Dr. Bruce Rogers and Mr. Stuart Lynne is continuing to show steady progress. Last month, I revealed the Alpha version of Fitness Dashboard. Fitness HRV is software that we are building to identify training intensities below VT1 (Ventilatory Threshold), and above VT2 (Traditional Threshold). The […]
Billat 30-30’s – Part Two
“Billat 30-30’s are intervals that require a hard effort for 30 seconds, followed by an easy recovery for 30 seconds. Over time, the body ends up playing ‘catch-up’, through heart rate, breath frequency, demand for oxygen at the muscular level, and a buildup of lactate in the system.
We can see this buildup through lactate testing, which is invasive and cumbersome, but we can also see it through SmO2 values, as muscles de-saturate and re-saturate. Lactate is getting processed back into energy, but sometimes the demand for oxygen is greater than the body’s ability to provide it. “
SmO2 (Saturated Muscle Oxygen) From Two Locations During Billat 30-30 Intervals
This is a chart from PerfPro Analyzer 2021 (Beta). PerfPro Analyzer continues to be my favorite workout and programming tool. It has the best display, the most customizable options, and Dr. Skiba’s Metrics are PUBLISHED and PEER REVIEWED. This cannot be said about other “Cycling Fitness” Platforms or their AstroTurf PhD’s. Remember, “In God We Trust, All Others Bring Objective, Peer-Reviewed, Published Data With Valid Hypotheses!”
Specifically, look at the two lines on this graph. The Upper Line is my SmO2 value from a Moxy Monitor placed on my Left Lateral Deltoid. The Lower Line is an SmO2 Moxy Monitor placed on my Right Vastus Lateralis. This image is from my warmup.
Intrinsic Insights – How What I Look At Applies to YOU
“The information I’m collecting right now is an attempt at revealing the INTRINSIC phenomena of exercise. When a bike ride starts, heart rate goes up. Muscles get squeezed. Breathing rate rises. Oxygen travels and Cardon Dioxide gets expelled. The bicycle moves forward. Calories are burned, Kilojoules are expended. The mind literally turns on extra channels to increase situational awareness, body position and risk assessment. I love this stuff!”
Physiological Baselines for “Base”.
On Christmas Day, I performed a 60-minute workout on PerfPro Studio. I also recorded the data on Vo2master software. The goal was two-fold. I wanted to perform a ramp test, to try and determine Physiological baselines, specifically Heart Rate at DFAA-1 0.75 and 0.500. I also wanted to see if I could determine Ventilatory Threshold 1 and Ventilatory Threshold 2. Finally, I wanted to determine whether I could ‘See’ deflection points via SmO2.
With this information, I can work on adaptation to higher loads of power and traditional heart rate.