When I first saw a CGM being used by a cyclist, I knew I needed to try one and start to figure it out. Immediately, I was struck by how incredible the information about my glucose level could help me with fueling before, during, and after riding. The ability to see your glucose levels as you work out was a real game-changer. After the first month of using a CGM, I realized I needed to spend more time learning about it and conducting a thorough examination of glucose metabolism and its potential to enhance the lives of athletes and their performances. Three years later, I am still learning!
VeloPress agreed to publish the first-ever book on Continuous Glucose Monitors, and I am super proud of how my new book came out. Plenty of graphs to illustrate key points, enough science to keep it grounded, and hopefully an ease of reading that is approachable for everyone. It’s not a book about power meters or other secret tech item, but it’s a book about a game-changing wearable that every athlete can use to help them improve. Many coaches and athletes have asked me, “Why did you write a book on CGMs and I can’t believe it’s out already. So many people haven’t even heard of these yet…” Others have told me, “Way to go, another ground breaking book. You are doing exactly what you did 20 years ago with Power Meters, I’d better get this and start learning it.” It’s been fun to have some great feedback already with only a few copies getting out there (as of July 18, 2025-The book offically launches on July 22nd, 2025) and I look forward to even more feedback so that I can make the 2nd edition even better.
I have created a website for the new book. I will be teaching Master Classes in using a CGM starting in September. Have a look. www.TrainingandCompetingwithaCGM.com

What can you learn from my new book?
- How to understand what your glucose response is to different sports nutrition
- How to best fuel before a workout or event to optimize your glucose.
- What high intensity workouts and constant pace workouts do to your glucose
- How to recognize the patterns of glucose drops and when to re-fuel.
- How to re-fuel so that you do not create a reactive hypoglycemic crash.
- Deternine the correct ratios of carbs/proteins/fats to ensure stable energy.
- Learn if you have a problem with your glucose levels. Could you show signs of insulin resistance?
These are just a few of the topics that I cover in my new book. I have a chapter on how to use a CGM for Type 1 and Type 2 diabetics, along with a chapter that everyone will love: How to improve your longevity and vitality using a CGM.
From Chapter 1, “Training and Competing with a Continuous Glucose Monitor”.
In Figure 1.5, we have an athlete that has a normal glucose level while sleeping, down around 90 mg/dL. He then gets up and has a high-carbohydrate breakfast, which spikes his glucose to nearly 180 mg/dL, before it begins to dissipate. At lunch time, he goes out for a meal at a Mexican restaurant. He indulges in some chips; a large burrito filled with beans, rice, and veggies; and finishes it off with four small chocolates back at the office. This sends his glucose value to 200 mg/dL, possibly higher,and keeps it there for over four hours! Clearly, this athlete didn’t need this much fuel on board.

I hope you will enjoy my new book. If you would like an autographed copy, click this link
The AUDIBLE and KINDLE Versions are HERE

