How E2O Denver Grew Revenue and Client Loyalty with VO2 Master Testing

Founded by Laura McDonald, MS, ACSM-CEP, E2O Denver – Health & Performance Physiology specializes in 1:1 strength training, small group training, metabolic testing, and realistic nutrition guidance for busy people. Their mission is to empower clients with practical, science-backed strategies that fit into real life.

100+

Metabolic tests completed in Year 1

$10,000+

New revenue from testing services

5 years+

Long-term client retention

"It’s been so rewarding to see people’s hard work paying off in a measurable way over time. Most of my career involved one-time diagnostic testing—this is completely different. Now, we’re building long-term health and performance stories."
-Laura McDonald, MS, ACSM-CEP

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Turning VO2 Master Data Into Long-Term Loyalty

The most powerful result of implementing VO2 Master at E2O Denver has been its impact on client retention. Instead of one-time assessments or generalized training plans, clients now see tangible evidence of their progress over time. Each retest becomes a milestone—reinforcing their commitment, building confidence, and strengthening their relationship with the program.

The Challenge: Precision Without the Lab

As a Clinical Exercise Physiologist, Laura McDonald wanted to move beyond estimates and field tests. She knew her clients could benefit from real, individualized metabolic data—but traditional lab equipment was costly, cumbersome, and inaccessible to the average client.

Without it, training and nutrition plans lacked the personalization required to deliver consistent, measurable progress. What she was looking for was a tool that could eliminate the guesswork and provide clear, actionable metrics to guide smarter training and lifestyle decisions.

Before, it felt like we were making educated guesses with calculations and field testing. I wanted a tool that could show people exactly how their body responds to exercise and fuel—taking the guesswork out of training and lifestyle modifications.”

– Laura McDonald, MS, ACSM-CEP

Founder Laura McDonald with client Jen, gearing up for an outdoor GXT test with the VO2 Master.

The Solution: Market Proven Portable Metabolic Testing on Site and Outside

VO2 Master delivered the science-backed precision of a lab in a portable, accessible format. It brought lab-grade precision into a wireless, portable, and accessible format—giving E2O Denver science-backed insights without the barriers of traditional testing.

Wireless and portable for use indoors and outside
Accurate and easy to use
Affordable investment with very good ROI

VO2 Master checked all the boxes: portable, wireless, accurate, and super user-friendly. I loved that I could use it anywhere—whether I was working in the gym, meeting a client at their gym, or at an event. Plus, the price point was more accessible than other lab-grade analyzers without sacrificing quality.”

– Laura McDonald, MS, ACSM-CEP

The Results: Growth Backed by Data

In its first year of implementation, portable metabolic testing with the VO2 Master analyzer became a core driver of E2O Denver’s success:

Long-term client retention strengthened with measurable progress metrics
5 years of client loyalty solidified—testing reinforced existing relationships
100+ metabolic tests completed
$10,000+ in new revenue generated

We’ve seen major improvements in both client results and business growth. Clients are hitting performance goals faster and with less confusion, and our testing services alone have increased monthly revenue significantly.”

– Laura McDonald, MS, ACSM-CEP

Client Results: Making Athletes Out of Everyday People

VO2 Master Testing has shown E2O clients what’s possible when consistency meets good training. Many who never considered themselves “athletes” are now putting up impressive numbers and tracking long-term progress.

One standout example is Jen, a 39-year-old mother of two living with Type 1 Diabetes. Active in her community and committed to her health, Jen surprised herself during her first VO2 max test:

39-year-old mom of two with Type 1 Diabetes
Daily walker & cyclist with her family
First VO2 Max test: 50.8 ml/kg/min
Ready to retest in 6 months with even bigger goals

VO2 Master has become a cornerstone of E2O Denver’s business model—strengthening client trust, boosting revenue, and elevating results.

If you’re serious about offering next-level, data-driven coaching, it’s a no-brainer. One of the best investments I’ve made for my clients and my business.”

– Laura McDonald, MS, ACSM-CEP

Ready to bring VO2 Master to your facility?

Talk to our solutions team about demos, pricing, and partnership opportunities—and discover how portable metabolic testing can transform your business.