You don’t need a smartwatch, a pricey longevity scan, or an intense gym program to get useful clues about how well you’re aging. New research suggests that everyday abilities — staying steady on one leg, getting out of a chair, moving quickly and maintaining your stamina — may say a lot about long-term health after age 65.
What the study found
Researchers in Taiwan followed 13,423 community-dwelling adults age 65 and older for a median of seven years. The group had an average age of about 73, and 62.5% were women. During the follow-up period, 1,631 participants died.
Before follow-up began, participants completed seven practical fitness tests designed to measure four broad areas:
- Cardio fitness: A two-minute stepping test.
- Strength: Repeated chair stands and weighted arm curls.
- Flexibility: A seated reach toward the toes and a behind-the-back reach.
- Balance and mobility: Standing on one leg and completing a short stand-walk-turn-sit test.
The takeaway was straightforward: better overall performance was linked with a lower risk of death during the study period. People in the highest overall fitness group had a 61% lower risk of death than those in the lowest group after the researchers accounted for factors such as age, sex, body size, medical history, lifestyle, and physical activity.
Balance came out on top
The strongest link was not necessarily bigger muscles or longer workouts. It was the ability to move safely and confidently.
The short mobility test — getting up from a chair, walking eight feet around a marker, returning and sitting down — was most strongly associated with lower mortality. Top performers had a 59% lower risk of death than the lowest-performing group. Strong results on a one-leg balance test were linked to a 50% lower risk.
Lower-body strength was next. People who performed best on the 30-second chair-stand test had a 45% lower risk of death than people who performed worst. Stronger performance on the two-minute step test, which measures heart-and-lung fitness, was associated with a 42% lower risk.
That makes sense from a practical standpoint. Balance, mobility, leg strength, and endurance all affect whether someone can avoid a fall, recover their footing, climb stairs, shop independently, and stay active. Falls are a major source of injury in older adults, and physical function can be an important marker of the body's overall reserve.
Flexibility wasn't the key
Flexibility was included in the testing, but it did not show the same strong connection to longevity as balance, agility, lower-body strength, and cardio fitness. That does not mean stretching has no value — it can support comfort, mobility, and range of motion — but it suggests flexibility alone is not the best stand-alone predictor of healthy aging.
From a nutritional biochemist’s perspective, this is a helpful reminder that longevity is not built around one “perfect” metric. The body benefits from a combination of movement, muscle, cardiovascular fitness, adequate protein and nutrient intake, sleep, and the ability to safely perform daily activities.
Don't use it as a verdict
This was an observational study, so it cannot prove that doing better on these tests directly causes someone to live longer. A person’s test results may also reflect other factors that influence health, including existing illness, access to care, nutrition, activity habits, or early frailty.
The research also captured fitness at a single point in time. It did not track whether later improvements in chair stands, balance, or step-test performance changed a participant’s risk. And because the study involved older Taiwanese adults living independently in the community, the exact results may not apply equally to everyone, particularly people with significant illness, severe mobility limits, or a history of frequent falls.
Still, these simple measures can spark useful conversations. They may help identify an area worth improving — not predict anyone’s lifespan.
How to use this
You do not need to turn your living room into a testing center. Focus on building the abilities these assessments reflect:
- Walk regularly at a pace that gently challenges your breathing.
- Include strength work at least twice a week, with particular attention to legs, hips, and core.
- Practice safe balance exercises, such as standing near a counter and briefly lifting one foot while holding on as needed.
- Use functional movements in daily life, including controlled sit-to-stands from a sturdy chair.
- If you have pain, dizziness, unsteadiness, a health condition, or a previous fall, ask a physical therapist or clinician for a tailored plan before attempting timed tests or challenging balance exercises.
This research doesn't mean you need to ace a fitness test after 65. It is that the skills required for everyday movement — getting up, walking steadily, keeping your balance, and maintaining stamina — are worth protecting at every age.
This article is for educational purposes only and does not replace medical advice. Speak with a healthcare professional or physical therapist before starting a new exercise program, particularly if you have heart disease, joint pain, dizziness, balance problems, or a history of falls.
