JS Performance Lab

Helping athletes with pain is a true passion and focus. If you aren't feeling great, reach out and we'll do a deep dive and get it figured out!

"I’ve been having left quad issues since the day I started road biking about three years ago. I probably spent upwards of 3k on bike fits, shims, wedges, etc etc. I go see Joe and he says “I’ll work with you till we figure it out”, and he did just that. My Q factor needed to be extended out about 8mils on both sides. Now, I feel like I can finally use both legs and it is amazing. Needless to say, I highly recommend if anyone needs a Bike fit, you go see Joe. I have gone to six different fitters and none of them have the knowledge or experience Joe does. I can’t thank him enough."
- Scott Dickerson

https://www.jsperformancelab.com/retul

Helping athletes chase their dreams is one of the most rewarding parts of what I do. Whether it’s reaching that dream race, crushing a personal best, or pushing beyond their perceived limits, I love being part of their journey and seeing them thrive while enjoying the process.

This year, I’m thrilled to have five athletes taking on the Leadville Trail 100 this August! The grit, determination, and heart they bring to this challenge are inspiring, and I couldn’t be more excited to see what they accomplish.

Here’s to big goals, big miles, and big memories ahead. Let’s get after it! 💪🏔️

Leadville 100 Coaching — JS Performance Lab 20 Years of Coaching the Leadville 100 Leadville 100 CoachingYou’ve worked hard to get in. You’re headed to Leadville! Now it’s time to work on getting everything right so race day is an amazing and life changing experience with a super positive outcome. Cost: $350/4 weeks Communication with y...

https://www.jsperformancelab.com/blog/insulin-the-master-storage-hormone-using-it-to-fuel-your-next-workout

Insulin, The Master Storage Hormone: Using It To Fuel Your Next Workout — JS Performance Lab Below is a Q&A regarding insulin and it’s actions

One more installment in the fueling to perform series.

The Science of Muscle Glycogen Replenishment for Endurance Athletes — JS Performance Lab For endurance athletes like runners and cyclists, muscle glycogen is the cornerstone of sustained performance. Whether you’re racing, training for a marathon, or completing a long ride, your ability to replenish glycogen stores after a workout directly affects your recovery and readiness for the n...

Chronic under-eating can lead to a host of issues. I'm guilty at times and I know many others struggle with it. Fueling is essential and having a plan in place is always ideal.

Do You Eat Enough? The Role of Cortisol and it’s Detrimental Effects — JS Performance Lab Undereating can trigger a cascade of hormonal changes in the body, with cortisol playing a central role. Cortisol, often called the "stress hormone," is released by the adrenal glands to help the body adapt to periods of stress, including inadequate calorie intake. While this response is m

As an athlete, managing your blood glucose levels is crucial to sustaining energy, optimizing performance, and ensuring quick recovery. Whether you're training for a race or pushing through a hard workout, understanding the ideal glucose levels for different types of exercise can help you avoid fatigue and enhance your performance.

Optimal Blood Glucose Levels for Athletes: How to Fuel for Maximum Performance — JS Performance Lab As an athlete, managing your blood glucose levels is crucial to sustaining energy, optimizing performance, and ensuring quick recovery. Whether you're training for a race or pushing through a hard workout, understanding the ideal glucose levels for different types of exercise can help you avoid fati

I've received a lot of request for a DIY endurance drink mix. While I really like a few brands that are making great stuff right now, it's also pretty simple to dial in a home brew.

DIY Endurance Drink Mix: A Budget-Friendly Performance Boost — JS Performance Lab When it comes to fueling your endurance workouts, there are plenty of excellent commercial sports drinks on the market. However, making your own endurance drink mix at home is a fantastic way to save money while still getting the performance benefits you need. Plus, you have full control over the in

Dialing in Gary’s gravel fit 🔥

Exploring alternative methods for blood glucose management, hot tubs and saunas have emerged as potential allies for individuals with type 2 diabetes. These heat therapies offer physiological benefits that can support overall glucose regulation and improve health markers.

Heat Exposure as a Tool for Managing Blood Glucose — JS Performance Lab Studies suggest that regular hot baths may improve glucose metabolism by lowering HbA1c levels—a measure of long-term blood sugar control…

RETUL Fit Client Review

"I recently had a bike fitting with Joe, and the experience was excellent. The process was incredibly thorough and tailored to me. He took into account my physical strength and flexibility while adjusting key components like my cleats, hoods, handlebars, seat height, and more.

After my first ride with the new fit, the improvement in comfort was tangible—it was like riding a completely different bike. Every adjustment seemed to contribute to a smoother, more enjoyable experience on the road.

While it’s hard to pinpoint the exact impact of the fitting on power gains due to the many variables involved, I’m confident that the changes have positively influenced my overall performance and comfort. I highly recommend Joe to anyone looking to optimize their cycling experience."
- Karl Kamin

RETÜL Bike Fit San Antonio, Texas — JS Performance Lab San Antonio Bike Fit Specialist. Using RETÜL 3D motion capture and 25 years of fitting experience to guarantee a perfect fit.

“Simply bringing your VO2 max from 'low' (bottom 25th percentile) to 'below average' (25th to 50th percentile) is associated with a 50% reduction in all-cause mortality.”
- Dr. Peter Attia

VO2 is the single best predictor of overall health. Get tested!
https://www.jsperformancelab.com/vo2-testing