The Best Longevity Tests Are Free: 3 Movement Assessments That Predict Mortality Better Than Supplements

Supplement subscriptions are becoming more common. Peptide protocols are all the rage. Monthly blood panels tracking obscure biomarkers are being marketed by your favorite Instagram doctors. Continuous glucose monitors are being sold to people without diabetes. The pitch is always the same: optimize everything, and you’ll live forever.

Here's what they don't tell you: none of the centenarians in Okinawa, Sardinia, or Ikaria are doing any of this. Maybe, these regions don’t mean anything to you. In that case, let me introduce to you: Blue Zones. This is the name of regions across the world that contain an absurdly high number of people who live a long time (often > 100 years old).

When we think about the science of longevity, our minds should gravitate towards understanding the mechanisms that genuinely allow people in Blue Zones to live well into their 90s. This is contrary to start-up, tech-bro based longevity, in which sexy marketing is often pushed before controlled studies are published.

Evidence-Based Longevity Tests

Test #1: Can You Get Off the Floor Without Using Your Hands?

A 2025 study tracked 4,282 adults aged 46-75 for ~12 years. Researchers scored their ability to sit and rise from the floor without support (0-10 scale). The mortality gap is pretty scary:

• Perfect score: 3.7% died

• Low scorers: 42.1% died

After controlling for age, sex, BMI, heart disease, hypertension, and diabetes, the lowest scorers still showed 6-fold higher cardiovascular mortality risk.That's not a typo. I repeat: 6 times higher. This single test simultaneously measures muscle strength, flexibility, and balance. It's a composite read on your neuromuscular system.

Test #2: How Fast Do You Walk?

Every 0.1 m/s increase in walking speed =  substantial reduction in mortality risk. The critical threshold: 1.0 m/s (about 2.2 mph). Below this, your mortality risk approximately doubles. Your walk from the parking lot to the grocery store is a phenomenal longevity biomarker (read more).

Test #3: Do You Take the Stairs or the Elevator?

A 2024 meta-analysis of more than 400,000  people found regular stair climbing reduced all-cause mortality by 24% and cardiovascular mortality by 39%. A UK Biobank study of 280,000+ participants found the sweet spot at greater than 5 flights per day.

Now let's talk about what you're actually spending money on.

Longevity Industry Red Flags: What's Not Backed by Science

NMN/NAD+ Boosters: $60-100/Month for (mostly) Mouse Studies

The pitch: Boost NAD+ levels, reverse cellular aging.

The reality: Very limited human longevity data. The studies showing benefits are mostly in mice or measure surrogate markers (like NAD+ levels themselves) rather than hard outcomes like mortality. Although preliminary evidence is positive (check here), consistent human data just doesn’t exist yet. Many supplement companies have a vested interest in you believing otherwise.
What actually works: Can you walk up two flights of stairs without stopping? No? Fix your mitochondria the free way: move your body under load.

Continuous Glucose Monitors (CGM) for Non-Diabetics

The pitch: Optimize your glucose response to every meal. Prevent metabolic disease before it starts.

The reality: For healthy adults without diabetes or prediabetes, there's no evidence that obsessively tracking glucose and making micro-adjustments to food timing improves longevity outcomes. The data supporting CGMs is in diabetic populations where the intervention has clear clinical utility.

What actually works: Walking for 10-15 minutes after meals improves glucose clearance better than any app-driven food-timing protocol.

Peptides: Unregulated Injectables

The pitch: BPC-157 for tissue repair. CJC-1295 for growth hormone. Epithalon for telomere length. The cutting edge of anti-aging medicine.

The reality: Most longevity peptides have close to zero long-term human safety data. The people living to 100 aren't injecting peptides (surprise!)…they're walking every day, being social with friends and family, and avoiding tons of alcohol.

Something that actually works: Strength training 2-3x/week builds the muscle tissue these peptides promise to preserve. Progressive overload is the only "anabolic signal" with 80+ years of evidence.

Monthly Longevity Blood Panels

The pitch: Track seemingly infinite biomarkers. Optimize everything from apoB to zinc levels. Catch disease early.

The reality: For asymptomatic healthy adults (who aren’t experimenting with peptides or similar), monthly screening could generate false positives and unnecessary interventions. Annual standard labs are fine for most people. 

What actually works: Eating unprocessed foods, sleeping 8 hours per night, exercising regularly, and being social!!!

Blue Zone centenarians don't optimize their labs.

My strong advice: invest in your physical health with exercise. Constant movement is medicine. Go to the gym, spend your money on a coach, on an app that helps you exercise. These are the things that will make a difference. The longevity industry makes billions selling complexity to people who won't do the simple stuff. Please don’t let that be you!

The data is unambiguous: functional capacity predicts mortality better than biomarkers. If you can't get off the floor, walk briskly, and climb stairs, no amount of optimization will save you.

Fix your movement. Build your strength.

At umo, we're not selling longevity. We're building tools that help you train smarter and harder, which happens to be what builds the functional capacity these tests measure.

We won't promise to extend your lifespan. But if you want to improve your sitting-rising score, your walking speed, or your ability to climb stairs without fatigue, you need to train consistently without breaking yourself. That's what our tracking does: it tells you when you're ready to push and when you need to back off.

Not a longevity hack. Just better training.