Joined January 2010
7 Photos and videos
29 Oct 2025
This is so unbelievably good. Captures the inner struggles of excellence really well. I feel for A.J. and understand him better now.
29 Oct 2025
Beneath all the speculation and red-alert headlines, A.J. Brown is chasing greatness — on his terms. If you must understand anything about him, it’s why catching the football is existential. And how he must manage its confines: nytimes.com/athletic/6721175…
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Alex Mather retweeted
Athletes don’t want another app. We want a doctor who gets it. @Eternal is primary care for people who move. 🩸 Bloodwork 💪 DEXA 👩‍⚕️ Clinicians who train too Starts at $499/year.
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Alex Mather retweeted
I've spent my entire career focused on helping humans improve both mentally and physically. To keep that ball rolling... I'm excited to officially share that I’ve partnered with @eternal, and not just as a podcast sponsor on @LongRunLabs and @ForTheLRPod, but as a consultant and sales lead helping shape their sales and go-to-market strategy. If you work in the outdoor, performance, or endurance space; whether building a brand, a product, or your own engine, you’ve probably had the same thought I’ve had: We spend so much time optimizing the work, but not nearly enough time on ourselves. That’s exactly why Eternal stood out. They’re building personalized healthcare for athletes, operators, and high-performers: people who treat health and performance like a long-term investment, not a short-term fix. Their flagship offering is a two-hour, in-person Performance assessment in NYC or SF, the "yearly physical for athletes" including 70 biomarker blood tests, metabolic testing, mobility screens, and movement analysis — all interpreted by sport-informed clinicians. No fluff, no generics, just actionable insight tailored to your lifestyle and goals. If you want next level support, you can opt for the Pro Plan, which includes year-long access to a Care Team that includes dietitians and physicians. Looking for a lighter option? Check out Foundations. This is the kind of data-driven, evidence-backed care that I’m stoked to have now that I’m squarely in my mid 30’s, and I’m fired up to help bring it to more athletes who need it. 🎙️ You’ll hear more about Eternal on Long Run Labs in an upcoming chat with founder and CEO @amather (he founded and sold The Athletic to The New York Times!), and from Kelsey Bailey, lead dietitian on FTLR, in an episode all about performance nutrition for runners. And maybe we can even get Larissa Rivers on to talk about her world marathon majors training and goal! 📊 You can check out their offerings at eternal.co - and leave a reply if you're interested in a sweet deal 😉 💡 If you’re curious about the experience or company, I’m always down to chat I've been super impressed by the team led by Alex Mather, as he brought many of his colleagues from Strava to The Athletic, and now to Eternal. Says a lot about the leader and overall culture when colleagues stick together for not just two, but three businesses. And look at that advisory board! Let’s build better... and stay healthy while we’re at it.
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8 Jul 2025
1) A beautiful, in-depth fueling strategy and plan with precision targets for calories and macros. 2) A thorough supplement review to dial your stack based on your deficiencies and performance needs.
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8 Jul 2025
Finally, we create a set of goals with biomarker-level targets for you. All accompanied with detailed videos and blue prints for delivering results. Foundations is available now in select states and the entire country soon. More here: open.substack.com/pub/eterna…

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8 Jul 2025
What if your doctor could combine your Strava and blood data to provide more than just biomarker results? There's now a blood lab for athletes. Eternal Foundations is a $499 blood lab built for runners, cyclists, and anyone else who demands more from their body.
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8 Jul 2025
Connect your Strava account and we internally process your active life. Other wearables are coming soon. Equipped with your blood and Strava data, we create personalized deliverables:
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8 Jul 2025
First, we run a comprehensive health check, benchmarking you against your peers, not the entire population. Heart, Metabolism, Hormones, major organs, and more. We then check you for common performance related issues like dehydration, overtraining, and low-energy availability.
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8 Jul 2025
Here's everything you need to know: eternal.co/memberships/found…

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Alex Mather retweeted
Second time’s the charm. Congrats to the @Eagles, Jalen Hurts, Saquon Barkley, Nick Sirianni and an outstanding defense for winning one for Philly. You earned it!
SUPER BOWL CHAMPIONS! THIS ONE’S FOR YOU PHILLY!
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Alex Mather retweeted
28 Jan 2025
I'm excited to announce that I'm working with @amather to build @eternal. We're empowering lifelong athletes to live a happier, healthier and more active life. Find out more by signing up for our waitlist at eternal.co!
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Alex Mather retweeted
15 Jan 2025
We collaborated with @amather and the team towards the tail end of 2024 to create a beautiful brand that aimed to design an identity bridging sports and medicine without screaming sports and medicine. Big shoutout to the team for trusting our team and letting us do our thing 😎
14 Jan 2025
Big personal news: I've taken on the challenge to define what healthcare looks like for the most physically active among us. Today, I’m thrilled to announce Eternal. Backed by $13.25M, we’re here to help you live harder, longer.
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Alex Mather retweeted
15 Jan 2025
As a beta tester of the product I can say with certainty that I’m very excited for this launch. Congrats Alex! It is time to help everyone refocus on sustainable, consistent health and fitness goals.
14 Jan 2025
Big personal news: I've taken on the challenge to define what healthcare looks like for the most physically active among us. Today, I’m thrilled to announce Eternal. Backed by $13.25M, we’re here to help you live harder, longer.
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Alex Mather retweeted
14 Jan 2025
Athletes are stuck navigating their health via reddit, podcasts, labs-by-mail, friends—not their doctor. Traditional care treats symptoms and baselines, not the whole person or their goals. Excited to back @amather team as they build the future of performance healthcare.
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14 Jan 2025
First check in at Eternal. Committed before I incorporated.
We at @terraincap are thrilled to back @amather and the Eternal team.
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14 Jan 2025
Big personal news: I've taken on the challenge to define what healthcare looks like for the most physically active among us. Today, I’m thrilled to announce Eternal. Backed by $13.25M, we’re here to help you live harder, longer.
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14 Jan 2025
We're backed by an amazing group of investors. The round was led by Lightspeed Venture Partners, co-led by Courtside Ventures, Treble Capital, and Next Ventures. Other investors include Founders Fund, Terrain, Jazz Venture Partners, Precursor Ventures, Bling Capital, Flare Capital Partners.
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