VO2 Max, Wattbike & the Future of Fitness

JULY 30, 2025 | Fellow Shareholders:

Let’s talk about where fitness is going, and why Wattbike’s newest innovation puts TRNR at the front of the pack.

Last week at Elevate 2025, the UK’s leading B2B fitness and health event, Wattbike appeared across three major stands: its own, COSMED, and Stanley Sports. But one topic kept stealing the spotlight:    VO₂ max.

VO₂ max is becoming the gateway metric for the next era of fitness — and Wattbike is leading the charge in making it accessible, actionable, and scalable.

Traditionally confined to elite sports labs, VO₂ max measures how efficiently your body uses oxygen , and it’s now widely considered one of the best predictors of long-term health, surpassing even BMI and blood pressure. With Wattbike’s new Healthspan Check, this critical health data can now be captured directly through a Wattbike, no lab required.

This turns every Wattbike into a data-enabled fitness gateway, a tool that not only guides training but also fuels deeper insights across gym floors, schools, clinics, and beyond.

Why this matters:

  • VO₂ max is now mainstream. Once locked in elite labs, VO₂ max is now recognized as a top predictor of long-term health, even more reliable than BMI or blood pressure. Wattbike is leading the charge to democratize access.
  • Wattbike Healthspan Check launches. This new tool revamps the VO₂ Sub Max Health Assessment Test to deliver a quick, guided, non-invasive VO₂ max estimate, benchmarked by age and gender. It gives users a cardiovascular fitness score in minutes, no lab, no guesswork.
  • Every Wattbike becomes a data gateway. This isn’t just a test. It’s a data layer. Gyms, clinics, and schools running the Healthspan Check now get anonymized insights that help shape programs, track progress, and personalize offerings, creating smarter operations and better outcomes. The test itself has been used for over five years, with hundreds of thousands of assessments completed across private medical providers like BUPA, Nuffield Health, Blackberry Health, and Spire Health in the UK, as well as Discovery Health in South Africa. Its VO₂ measurement is validated by independent, peer-reviewed research. This offers confidence and credibility to every result. There is no other equipment in our price range that can match the accuracy of Wattbike’s VO₂ measure. Most others require additional equipment such as a gas mask, which is a USP for us. This means no uncomfortable mask, no max testing to get a valid VO₂ score.
  • It’s a business accelerator. For gym owners, it’s lead-gen. For school programs, it’s athlete tracking. For clinics, it’s preventive care. For TRNR, it’s a real-time view into customer engagement and performance, across both consumer and commercial segments.
  • We’re just getting started. As TRNR integrates Wattbike and prepares to close the Sportstech acquisition, tools like this form the foundation of our platform vision: delivering AI-powered, evidence-based training that enhances both lifespan and healthspan.

We said the future of fitness would be measurable, connected, and scalable. With the Healthspan Check, we’re proving it, and unlocking more value from every Wattbike in the field.

Thanks for being on this journey with us. There’s more to come.

Let’s keep building,
 — Team TRNR

(For more details on VO₂ and Healthspan, visit this link)

Forward Looking Statements:
This communication contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These statements reflect current expectations, assumptions, and projections of Interactive Strength Inc. (“TRNR”) management regarding future events and business performance. Forward-looking statements include terminology such as “anticipate,” “believe,” “expect,” “intend,” “plan,” “may,” “will,” “should,” “estimate,” “target,” “project,” or similar expressions. These statements include, but are not limited to, those related to the adoption and commercial rollout of the Wattbike Healthspan Check, the ability of TRNR to capture and utilize VO₂ max data at scale, the integration of Wattbike into TRNR’s broader platform vision, potential use cases in clinical, educational, and fitness environments, and expected business or customer engagement benefits resulting from these innovations. These statements are based on current assumptions and subject to known and unknown risks, uncertainties, and changes in circumstances that could cause actual results to differ materially from those expressed or implied. These risks include, but are not limited to, market adoption rates, competitive developments, regulatory considerations surrounding health data, operational execution, data security and privacy concerns, supply chain constraints, and macroeconomic conditions. There can be no assurance that future developments will be aligned with these forward-looking statements. Actual outcomes could differ significantly due to a variety of factors, some of which are beyond the control of TRNR. We undertake no obligation to update any forward-looking statements to reflect events or circumstances after the date they are made, except as required by law. For more detailed risk factors and disclosures, please consult our filings with the U.S. Securities and Exchange Commission.