News · Fitness & Exercise
Simple fitness tests like standing on one leg predicted survival in 13,423 older adults
Doctors judge older patients' risk mostly by their illnesses. In Taiwan, quick tests of balance, strength and stamina tracked strongly with who was still alive seven years later.
- An observational study of 13,423 adults aged 65 or older in Taiwan who took standard fitness tests in 2015 and 2016.
- Tests covered stamina, strength, flexibility, balance and agility, such as standing on one leg and rising from a chair.
- Over about 7 years, 1,631 people died.
- The fittest fifth on a combined score had about 61% lower risk of death than the least fit fifth.
- Fitness was measured once, and fitter people may be healthier in ways the tests do not capture.
When doctors estimate how an older patient is likely to fare, they usually count illnesses: heart disease, diabetes, lung problems. How well the person can move rarely enters the calculation, even though anyone who has watched an older relative rise from a chair knows how much it can reveal.
A study in JAMA Network Open followed 13,423 adults aged 65 or older in Taiwan who had taken a set of simple fitness tests. Those who did best were far more likely to be alive about seven years later.
Why fitness matters in later life
MedlinePlus is plain that exercise and physical activity are good for just about everyone, including older adults, and notes that strength exercises make your muscles stronger, alongside benefits for balance and endurance. Those abilities are what keep people independent.
The authors argue they deserve a bigger role in medical risk assessment. As they write, clinical risk stratification in older adults relies largely on comorbidity burden, often overlooking functional capacity, meaning what a person can physically do.
How the fitness tests study worked
Community-dwelling adults aged 65 or older completed standardized fitness assessments at testing stations across Taiwan in 2015 and 2016. Their results were then linked to national health insurance records, with deaths tracked through 2022.
There were seven tests covering four areas: stamina (a 2-minute step test), strength (30 seconds of arm curls and of rising from a chair), flexibility (two reaching tests), and balance and agility (standing on one leg, and the 8-foot up-and-go, a timed stand, walk, turn and sit). The researchers also combined all seven into one fitness score.
What happened to survival
Over a median of seven years, 1,631 of the 13,423 participants died. People in the top fifth for performance on four of the tests had markedly lower risk of death than those in the bottom fifth, after adjusting for age, other illnesses and self-reported physical activity.
The strongest single signals came from the up-and-go and one-leg balance tests, with risk roughly halved or better, followed by the chair stand and step test. The composite fitness index showed the lowest risk of all-cause mortality, about 61% lower in the fittest fifth than in the least fit fifth.
Why simple fitness tests could be useful
These tests take minutes, need only a chair, a stopwatch and a few meters of floor, and are already used in many clinics and senior programs. The authors conclude that objectively measured physical fitness across domains was associated with mortality, supporting its value alongside illness counts.
For individuals, the results give concrete targets. Balance, leg strength and the ability to get up and move quickly are trainable at any age, and they are exactly what these tests measure.
What a fitness cohort study cannot prove
The authors list the limits. The observational design precludes causal inference, and people who test poorly may already be unwell in ways that affect survival, rather than their fitness itself being the cause.
Fitness was measured once, so changes over time were not captured. People had to be able to reach a testing station and complete the tests, which favors healthier, mobile older adults. Smoking was not recorded, and causes of death were not examined.
What this changes for older adults and fitness
For older adults, the practical message is to keep up the kind of activity these tests reflect: walking, strength work for the legs, and balance practice such as standing on one leg near a support. Guidelines recommend all three for this age group.
For clinicians, the study adds weight to including a quick physical test in routine checkups. It says something about a person’s reserves that a list of diagnoses does not.
People also ask
What did the study find?
Of 13,423 participants, 1,631 (12.2%) died over a median 7.0 years. Compared with the lowest-performing fifth, the highest had lower mortality on the 8-foot up-and-go (adjusted hazard ratio 0.41), 1-leg stance (0.50), 30-second chair stand (0.55) and 2-minute step test (0.58). The composite fitness index showed the lowest risk (0.39).
What were the tests?
A 2-minute step test for stamina, a 30-second arm curl and chair stand for strength, back scratch and chair sit-and-reach tests for flexibility, and a 1-leg stance and 8-foot up-and-go for balance and agility.
What is the 8-foot up-and-go test?
Standing up from a chair, walking about 2.4 meters, turning, walking back and sitting down, as quickly as is safe. It combines strength, balance and walking speed.
Does this mean fitness training will make people live longer?
The study cannot show that. It found that fitter people lived longer, not that improving fitness extends life, although trials show exercise improves strength and balance in older adults.
Which test was most telling?
The up-and-go and one-leg stance tests showed the largest differences. A combined score using all seven tests showed the strongest association.
Can I try these at home?
Several are simple, but older adults with balance problems should test near a sturdy support or with someone present. A doctor or physical therapist can assess fitness safely. This is general information rather than medical advice.