Project Aeterna measures the muscle function the scale can't see — strength, balance, and gait — and benchmarks your results against women your age. No hype. Just data.
"Menopause is a muscle event, not just a hormone event. Every woman in our community deserves a real baseline — not guesswork."
PJ Wren · Founder, Over Fifty Fitness · 1,550+ workouts for women 40+
PJ's community is built around active women who want to push further. Project Aeterna gives them a real baseline to train against.
Science-backed guidance from registered dietitians and physicians — cutting through the misinformation around GLP-1 medications.
Ana Reisdorf, MS, RD · Founder, GLP-1 Hub · Registered dietitian, 15+ years
GLP-1 Hub's content is written and medically reviewed by registered dietitians and physicians — founder Ana Reisdorf, MS, RD, and Dr. Janelle Duah, MD, dual board-certified in Internal Medicine and Obesity Medicine — covering the diet, lifestyle, and research side of GLP-1 therapy. Project Aeterna gives that same community the muscle-function data their medication tracking doesn't show.
Illustrative example based on population research · Individual results vary
"Most women in this programme think they're doing everything right — until they see their Aeterna Movement Score."
Not because they're not trying. Because no one has ever given them a real number. The test doesn't judge effort — it measures outcome. That difference is everything.
Find Out Where You Actually Stand →
Muscle is the organ of longevity.
Project Aeterna gives you the data to understand yours — and act on it.
Most health platforms track weight, steps, and sleep. None of them measure what actually predicts long-term independence: how strong, stable, and capable your body is in everyday life.
For women 40 and over — whether navigating hormonal change, weight loss on GLP-1 therapy, or simply the biology of aging — muscle function is where the real story is. Strength, balance, and how easily you move decline in ways that often go undetected until the gap is wide. Project Aeterna measures exactly this, benchmarked against women your age using 25 years of published population data.
The good news: these changes are measurable early, and early action makes the biggest difference.
The free test tells you where you are today. Pro adds balance and gait, an Aeterna Movement Score, and a published physical-function outlook showing how women like you tend to trend over time.
Tell it what you're already doing — HRT, GLP-1, creatine, resistance training — and see how each compares against real published intervention research. This is the conversation your doctor should be having with you.
Unlock Pro — $99/year →Annual plan · Cancel anytime · $8.25/month
GLP-1 medications like Ozempic and Mounjaro are remarkably effective at reducing weight — but the science on muscle is more nuanced than headlines suggest. Most women preserve functional strength. But the picture varies significantly by age, baseline muscle mass, activity level, and whether you're also navigating hormonal change. Knowing which category you're in is the actual question.
Retesting your Aeterna Movement Score every 8–12 weeks is the earliest signal that muscle is being protected — or lost.
"The women most at risk are the ones who feel like it's working — because the scale is moving. But if you're losing muscle, not fat, the number that matters is your Aeterna Movement Score, not your weight."
Project Aeterna Research Team
Project Aeterna was built by researchers who have spent careers studying exactly what happens to strength, balance, and physical capacity as women age. The science isn't adapted from general wellness research — it is the research. Every metric, every normative table, every recommendation traces back to peer-reviewed publications from this team or the foundational studies their work builds on.
Distinguished scientist and researcher specialising in the cellular and molecular biology of muscle and bone aging. Research spans muscle aging, longevity interventions, the kynurenine pathway, and sex-specific muscle transcriptomics. Active publications through 2025–2026 in Geroscience, Biochimie, and JCI Insight.
Section Chief of Endocrinology, specialising in regenerative medicine, bone health, and the biological mechanisms of healthy aging. Co-investigator on NIH-funded studies of musculoskeletal aging, dietary interventions, and the role of tryptophan metabolism in lifespan extension.
Expert in cellular biology of musculoskeletal aging. Co-author on studies of lipid metabolism in muscle and bone aging, COVID-19-related muscle loss, and microbiota-derived compounds that extend lifespan and improve muscle and bone health. Publications active through 2026.
Topics include muscle aging, longevity interventions, tryptophan and kynurenine metabolism in aging muscle, sex-specific muscle transcriptomics, lipid metabolism in age-related musculoskeletal disorders, and microbiota-derived compounds that improve muscle and bone health. Continuously NIH-funded for over a decade.
No signup · No equipment · 90 seconds
Most longevity apps treat all women the same — or hand you a personalised-sounding number from a model no one can audit. Project Aeterna Pro takes a different approach — it compares what you're already doing (HRT, GLP-1, resistance training, creatine) against real published intervention research, so every recommendation traces back to a citation, not a proprietary algorithm.
Tell Pro your hormonal profile and what interventions you're using, and it shows you how women with similar profiles have trended in the published literature — including the Aeterna Movement Score, balance, and gait data behind that comparison.
Few consumer health apps ground their guidance this directly in published research. It exists because the team that built it has spent decades studying exactly these mechanisms.
Age, height, weight, and menopause stage. Four questions that personalise your score against age-matched peers drawn from NHANES population data, with menopause-stage context informed by the SWAN cohort study.
Processed on your device. Never transmitted or stored.
Stand up from a chair fully, sit back down — as many times as you can in 30 seconds. Tap the screen to count each stand. No equipment needed.
Rikli & Jones (1999) 30-second chair stand protocol.
Your category. Your peer percentile. One clear action to take next. Data that previously required specialist equipment — in under two minutes.
Pro adds the full 3-test battery, an Aeterna Movement Score, and your published physical-function outlook.
Simple, research-grounded input. Hold your phone and tap +1 each time you stand — matching the original observer-count method from the Rikli & Jones validation. This tap-based rep count is the same count used in NHANES normative comparisons.
The free test gives you real, useful data. Pro is an annual plan — no monthly billing, no recurring surprises.
Includes the complete 3-test assessment, Aeterna Movement Score, intervention comparison, and annual tracking.
✦ Use code OFF for $49 first year
Most women take the free test, see their number — and then want to know: is it going to get worse? Pro answers that. It adds balance and gait, an Aeterna Movement Score, and a published physical-function outlook — plus one specific action to take next.
$8.25/month · Cancel anytime · Built on published research
Published in the Journal of Aging and Physical Activity. Established normative data and test-retest reliability for the STS protocol. This is the study your score is built on.
Your percentile is drawn from the National Health and Nutrition Examination Survey — real population data from real women your age, stratified by BMI and menopause stage.
The team's most recent work — published in Biochimie and Geroscience — directly informs the intervention recommendations used in Pro.
Pro compares what you're doing — resistance training, creatine, HRT, GLP-1 therapy — against outcomes reported in published studies, with a citation behind every recommendation. It's a comparison to real research, not a proprietary model output.
A 20+ year longitudinal cohort tracking women through the menopause transition. Greendale et al. (2019, JCI Insight) grounds how strength and lean-mass change by menopause stage; Solomon et al. (2022, JAMA Network Open) is the published 10-year cohort data behind Pro's physical-function outlook.
Followed 5,472 women aged 63–99 for 8+ years. Faster 5-rep sit-to-stand time was linked to 34% lower mortality, independent of physical activity, sedentary time, and inflammation. The largest study to date on muscular strength and longevity in older women.
A pooled analysis of 9 cohorts and 34,485 older adults found gait speed predicted survival about as well as models built on age, sex, chronic conditions, and hospitalisation history. The foundational citation behind Pro's gait speed assessment.
Among 1,702 adults aged 51–75, inability to hold a 10-second single-leg stance was associated with 84% higher all-cause mortality — independent of age, sex, and standard clinical measures. The foundational citation behind Pro's one-leg balance test.
The sit-to-stand test has been a standard tool in gerontology for 25 years. It measures lower body strength and power — and a faster time is independently linked to lower mortality in women, even after accounting for physical activity and inflammation (LaMonte et al., 2026, JAMA Network Open). It has been validated across multiple studies, referenced in NHANES normative data, and used in research worldwide.
Gait speed and balance carry the same weight in the published literature. A pooled analysis of over 34,000 older adults found gait speed predicts survival about as well as a model built on age, chronic conditions, and hospitalisation history (Studenski et al., 2011, JAMA). Inability to hold a 10-second single-leg balance has been linked to an 84% higher mortality risk (Araújo et al., 2022, British Journal of Sports Medicine). Pro's full 3-test battery exists because all three — strength, gait, and balance — are independently validated, not because more tests sounds more rigorous.
Research is increasingly clear that muscle function declines in ways that often go undetected — accelerated by hormonal change, weight loss interventions, and the natural biology of aging after 40. The sit-to-stand protocol captures this directly. When the app recommends a specific action, that recommendation traces back to peer-reviewed evidence — not a wellness algorithm.
This is where SWAN — the 20+ year Study of Women's Health Across the Nation — matters: it's the specific longitudinal evidence the model draws on for how strength and lean mass change through the menopause transition, not just general aging research.
The tap-to-count input method is actually closer to the original Rikli & Jones observer-count methodology than an automated sensor would be. The rep count is the rep count. The NHANES normative tables don't care how it was recorded.
Take the Free Test →All test processing happens locally on your phone. Sit-to-stand data is analysed in real time and not stored. We never collect your health data, location, or any biometric information. No account or email required to take the test.
Your Aeterna Movement Score reveals where you're losing ground. The science is clear on two inputs that directly support muscle function — and both are chronically under-consumed by women after 40.
We partnered with Momentous because their products are third-party tested, NSF Certified for Sport, and built on the same peer-reviewed research base we use at Velogenix. Momentous’s women’s supplement line was developed in collaboration with Dr. Stacy Sims, whose research on female physiology and GLP-1 interactions directly informs our recommendations — and whose Collective X Health partnership with Momentous is actively funding new female performance research that underpins these recommendations.
If you're an RD, personal trainer, or clinician working with women on GLP-1 therapy, menopause, or healthy aging — your clients are asking questions you can't fully answer without a functional baseline. Project Aeterna gives you that baseline, grounded in the same NHANES and SWAN cohort data used in published research.
You provide the trust and the programming. We provide the musculoskeletal intelligence. Neither of us can do the other's job — and that's the point.
Talk to Us About Practitioner Access →90 seconds, a chair, and your phone. Get your category, your peer percentile, and one evidence-based action — emailed to you instantly.
Takes 90 seconds · No equipment · 25 years of published research
We're researchers first. If you have questions about the science behind your score, want to report a bug, or are interested in partnering with Velogenix — we'd like to hear from you.