Your chronological age is just a number. Your biological age — how your body and mind are actually functioning — is the number that matters. The five assessments below take less than 30 minutes combined, require no lab work, and can be done at home. They don't replace a physician's evaluation, but they will give you an honest, data-driven snapshot of how well you're aging right now.
Test 1: The Sitting-Rising Test (SRT)
Developed by Brazilian physician Claudio Gil Araújo, the SRT is a remarkably predictive measure of musculoskeletal fitness, flexibility, motor coordination, and balance — all of which decline with age if left untrained.
How to do it:
- Stand barefoot on a hard floor in comfortable clothes.
- Without using your hands, knees, or forearms, lower yourself to a cross-legged sitting position on the floor.
- Then rise back to standing — again, without support.
Each movement scores up to 5 points (10 total). Deduct 1 point each time you use a hand, knee, or forearm for support, and 0.5 points for a loss of balance. A score of 8 or higher correlates with significantly lower all-cause mortality risk in adults over 50.
Test 2: The One-Leg Balance Test
Balance deteriorates faster than almost any other physical capacity as we age, and poor balance is a leading predictor of falls and fractures. A 2022 study published in the British Journal of Sports Medicine found that inability to stand on one leg for 10 seconds in midlife was associated with an 84% higher risk of all-cause death within a decade.
The test: Stand near a wall for safety. Lift one foot off the ground and hold the position with eyes open. Time yourself. Under 10 seconds is a red flag at any age under 70. Aim for 20+ seconds under 60, and 10+ seconds under 70.
For an added challenge, try the test with your eyes closed. Removing visual input forces your vestibular and proprioceptive systems to work harder — and exposes weaknesses that open-eye testing hides.
Test 3: Grip Strength
Grip strength is one of the most researched biomarkers of aging. It correlates strongly with overall muscle mass, cardiovascular health, and cognitive function. You'll need a hand dynamometer (available for under $30 online) for an accurate reading.
General benchmarks (dominant hand, in kilograms):
- Men ages 50–59: aim for 40+ kg
- Women ages 50–59: aim for 25+ kg
- Men ages 60–69: aim for 35+ kg
- Women ages 60–69: aim for 22+ kg
If you're below these thresholds, progressive resistance training — particularly exercises that load the forearms and hands — can reverse the decline within a few months.
Test 4: The Cognitive Speed Check
Processing speed — how quickly your brain handles new information — begins declining in the mid-30s and accelerates after 60. A simple proxy test is the Trail Making Test Part A, which is freely available online. You connect numbered circles (1 through 25) in sequence as fast as possible. Most cognitively healthy adults under 60 complete it in under 29 seconds. Over 60 seconds suggests processing speed worth discussing with a neurologist.
Alternatively, track your performance in a mentally demanding game — chess, Sudoku, or a dual-n-back app — over 90 days. Sustained improvement means your brain is still plastic and trainable. Plateau or decline is a signal to prioritize sleep, cardiovascular exercise, and social engagement, all of which have strong evidence for cognitive protection.
Test 5: Resting Heart Rate Recovery
Your heart rate recovery (HRR) — how quickly your heart rate drops in the two minutes after peak exercise — is one of the gold-standard measures of cardiovascular fitness and autonomic nervous system health. Research published in the New England Journal of Medicine found that an HRR of 12 beats or fewer in the first minute after exercise predicted significantly higher mortality risk.
How to test it: Perform a brisk 3-minute step test (stepping up and down a standard stair), then immediately sit and record your heart rate. Measure again exactly 1 minute later. A drop of 20+ beats per minute is excellent. A drop of less than 12 beats warrants a conversation with your physician and a serious look at your aerobic fitness routine.
- Peter Attia, MDThe goal is not to live forever. The goal is to die young as late as possible.
What To Do With Your Results
Run all five tests today and log your scores. If you score well across the board, your lifestyle habits are working — keep them consistent. If one or two scores are below the benchmarks, treat those results not as a verdict but as a training target. The research is unambiguous: balance, strength, cardiovascular fitness, and cognitive speed all respond to deliberate, consistent training well into the 70s and beyond. Reassess every 90 days. The trajectory matters far more than any single data point.
Share these tests with someone you care about. Aging well is rarely a solo endeavor — accountability partners, training companions, and honest conversations about health are themselves strong predictors of longevity.
