training with moxy


The Moxy public webinar series is intended to highlight various ways that athletes incorporate Moxy into their training. The topics will range from cover physiology, training techniques, injury prevention, data analysis, software packages, and more. The presenters will be real Moxy users and the content will be structured for athletes that don’t necessarily have a physiology background.

Next Webinar

Previous Webinars

Metier Racing and Coffee

This webinar is a tour of the new Metier Racing and Coffee facility in Seattle.  David Richer shows the space and explains the training services that he and Todd Herriott have developed.  The second half focuses more on the training services and the ways that they have integrated Moxy.

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CLICK HERE to Join the discussion of these webinars on our Forum.



The Moxy Forum THE PLACE to participate in the development of muscle oxygenation science as it happens. Post your own questions, case studies, or examples or just scan through the thousands of posts to learn about the many varied ways that Moxy can be used to enhance training. Click below to read some of the best Moxy Forum posts, join the discussion, and learn something new.

+5-1-5 Test on a Cyclist

This post discusses a 5-1-5 test on a cyclist. There is discussion on the level of SmO2 desaturation and on how the THb values should be interpreted. There are some ideas on how to distinguish between a THb increase caused by venous occlusion versus an increase caused by vasodilation.

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+5-1-5 Test on a Runner

This post covers a 5-1-5 test on a fit runner. There is discussion on the interactions between SmO2 and heart rate. It also talks about the implications of respiration. There are some follow up tests that shows SmO2 and THb while the same athlete is doing intervals.

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+Strength Training

This post covers how Moxy can be used to inform strength training. There is data from squats and shoulder presses. There are some ideas on how to guide strength training based on the THb and SmO2 responses to maximize the strength adaptation.

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+Triathlon Discussion

This post discusses assessing multi-sport athletes. There is some discussion that the physiologic limiter may be different in different sports. There is data from a “Brick” 5-1-5 test that alternated between biking and running.

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+Sensor Placement Discussion

This post discussions the optimal muscles on which to place the Moxy sensor. It discusses the options for several sports and talks about when you may want to consider a non-involved muscle. It also goes into some of the relationships between Moxy measurements and surface EMG.

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+Using THb

This post talks about how THb is as important as SmO2 in muscle oxygenation analysis. It covers a swimming example where the THb response is very different at the end of a workout compared to how it started at the beginning.

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For all other articles, click here to visit the Moxy Forum!


The Moxy blog has information that is more carefully edited than the forum but it also reflects how we’ve learned over time. We’ve left all of the blog posts in place so you can see how our thinking has evolved over time. Here are a few posts that might be helpful in understanding muscle oxygenation and some of thinking throughout the website.

+My Take on Training Intensity Zones

This blog is the first of a series of posts that will explore training intensity zones.

My Background

First, some background on me. I invented the Moxy Muscle Oxygen Monitor and started to explore athletic applications for the technology based on the educated guess (and a suggestion from a cardiologist) that knowing oxygen levels in working muscle would somehow be helpful for training. My background is in engineering and I have almost no experience with exercise physiology. Luckily, I’ve met a lot of smart people that do understand exercise physiology and there’s tons of information available on the internet so I’ve been able to learn as I go.

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+Determining Training Intensity Zones: Rating of Perceived Exertion

Rating of Perceived Exertion (RPE) is the simplest method for setting training intensity zones. Essentially, the athlete self-reports how hard they are exercising. It is inherently subjective, since there is no way to externally verify what the athlete is feeling.

Borg Rating of Perceived Exertion

There are many different ways of rating exertion. One of the more formal and widely used scales is called the Borg Rating of Perceived Exertion. In this system, the athlete rates their exertion on a scale of 6 to 20 based on the following table.

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+Determining Training Intensity Zones: Maximum Heart Rate

This is the third post in my series on determining training intensity zones.  The topic of this post is using Maximum Heart Rate to define training intensity zones for an individual athlete.

It’s important to be clear on the topic here.  Many Training Intensity Zones use heart rate as the main feedback metric for the athlete to adjust intensity while they work out.  The method discussed in this post uses the concept of Maximum Heart Rate to determine the heart rate zones for each athlete.

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+Determining Training Intensity Zones: VO2 Max

Here is the fourth post in my series on determining training intensity zones. Today’s topic focuses on using VO2 max to define training intensity zones for an individual athlete.

What is VO2 Max?

VO2 is the total amount of oxygen that your body consumes every minute.  It is expressed in mL of oxygen per minute. VO2 max is the maximum amount of oxygen that your body can consume per minute.  VO2 is measured by wearing a mask or mouthpiece to capture your breath.  The volume of air inhaled and exhaled is measured; the gasses in the air are then measured as a percentage. For example, if you are moving 30 L (30,000 mL) of air per minute and the incoming air is 21% oxygen and the exhaled air is 17% oxygen, your VO2 is 1200 mL per minute (21%-17% = 4%; 4% of 30,000 mL= 1200 mL).

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+Determining Training Intensity Zones: Lactate Threshold

This is probably the single topic in this blog series on determining training intensity zones which is going to stir up the most controversy.  I’ll start with a quick summary so you know where I’m headed with this, and then I’ll go into some more details. First a quick reminder: I’m an engineer trying to learn exercise physiology. As such, I don’t claim to be an expert, just an interested outsider.

Quick Summary: The concept of Lactate Threshold is based on wrong information.

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+Training Intensity Zones: Functional Threshold Power

Functional Threshold Power (FTP) has become a very popular method for setting training intensity zones among cyclists. FTP seems to overcome some of the drawbacks of the other methods for setting training intensity zones that I’ve discussed so far.

What is FTP?

Functional Threshold Power is generally defined as your power at your Lactate Threshold. We could just stop there and refer back to the previous discussion on Lactate Threshold. However, FTP is often determined by a different method than by measuring blood lactate. This is where it gets interesting.

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+Setting Training Intensity Zones: Muscle Oxygen

In this post, I will discuss how Muscle Oxygen monitoring is used to determine training intensity zones, and how it compares to the other methods. Specifically, I will analyze how we use our Moxy Monitor device to determine training intensity zones. As you read on, keep in mind that I assume the goal of performing any physiologic assessment is to gain information which can be used to help the athlete train more effectively.

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+Training Intensity Zones: Muscle Oxygen and the Limiting System

In this post, I want to go beyond simply determining training intensity zones to determining what factor is limiting the performance intensity of the athlete.

All of the systems that have been discussed so far in this 8-part blog series are primarily concerned with determining training intensity zones, but none of them shed any light on why those zones are what they are. This leaves some open questions like:

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+Thoughts on Finding the Limiter

As you read through our Forum, ebooks, and blog, you’ll find a lot of discussion about using Moxy to find what’s limiting an athlete’s performance. We call this the “Limiter.” I want to share some thoughts on this terminology because I think it comes across bit negatively, like there’s something wrong, when that’s not at all what’s intended

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+How We Use Moxy for Sport-Specific Assessments and Training

What if you could tell how long an athlete could skate full-out, fully recover, and do it again?

How many shifts? How many do you need – because the equipment you used to assess is the same used to guide your training. Welcome to the world of Moxy, where we do sport-specific assessments and training based on science.

This is the story of how, upon the shoulders of brilliant thinkers, scientists, physiologists, strength trainers, and coaches we – Juerg & Andri Feldmann and Brian Kozak, plus a small group of exercise physiologists, coaches and medical professionals – are able to assess the ideas/theories/research of the above mentioned brilliant thinkers and see “live what works.”

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Click Here to Visit the Moxy Blog and read other great articles!

Training Centers

Becoming a Moxy Charter Certified Training Center is another way to learn more about using Moxy for training. This program offers assistance with Athlete Assessments, gives you access to members only Webinars, and allows you to join the community of other Charter Certified Training Centers that use Moxy.

For more information on becoming a Moxy Certified Training Center, Click Here!
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