No. A strong lift tells you about one capacity and very little about balance, aerobic fitness or getting up off the floor. In studies of middle-aged and older adults, each of those has its own association with survival. After 40, test all four capacities and train whichever one you have never measured.
Most people over 40 who train know their best number by heart. A deadlift. A bench press. A mile time. It is a fair source of pride. That number took years to build.
Keep it. Just know what it can and cannot tell you. A big lift tells you one capacity is in good shape. It says very little about the other three, and those are usually the ones that slip without anyone noticing.
This article is about that blind spot: why a strong lift hides weak spots, what the research says about measuring more than one thing, and how to find the capacity you have never tested. If you want the full framework first, start with the FACE Framework.
Why This Matters After 40
People train what they are good at. It feels productive, the numbers go up, and the progress is easy to see. So the lifter keeps lifting, the runner keeps running, and the capacity neither of them touches drifts quietly in the background.
Ask a room of adults over 40 for their best lift and most can answer on the spot. Ask how long they can stand on one leg with their eyes open and almost nobody knows. What you never test is what you never see slipping.
Strength itself is also more than one quality. Maximal strength, the heaviest weight you can move once, tends to decline slowly with age. Muscle power, how quickly you can produce force, appears to fade sooner (Wiegmann et al., 2021). Power is what you use to catch a stumble or take a step up in a hurry. A heavy, slow lift can hold steady while that faster quality declines underneath it.
In 25 years of coaching, the people I see get hurt in their fifties and sixties are rarely weak everywhere. They are strong where they trained and exposed where they did not. Your program only protects you where it reaches.
One Capacity Can’t Cover for Another
LFS assesses four capacities under the name FACE: Flexibility, Aerobic capacity, Carry a load and Equilibrium. In observational research, each one has its own association with how long people live. Those are associations, not proof that training any one of them will extend your life. The point here is narrower: each capacity shows up on its own, separately from the others.
Being strong in one place doesn’t make you capable in the other three. Your deadlift will not tell you whether you can balance on one leg. Your mile pace will not tell you whether you can get up off the floor without using your hands.
What the Research Shows
Balance. Among adults aged 51 to 75, those who could not stand on one leg for 10 seconds had an 84 percent higher risk of death from any cause over a median follow-up of about seven years. That was in a model adjusted for age, sex, body mass index and existing conditions (Araujo et al., 2022). It is an association. It does not show that balance training extends life.
Getting to the floor and back. In middle-aged and older adults followed at a single exercise medicine clinic, lower scores on a test of sitting down on the floor and standing back up went with higher risk of death, in a graded pattern: the more support people needed, the higher the risk (Araújo et al., 2026). The test asks for range of motion, strength and balance at once, so it does not isolate any one of them.
Aerobic fitness. In a retrospective cohort of 122,007 adults who completed treadmill testing, risk-adjusted mortality fell as fitness rose and was lowest in the most fit group. The gap between the least and most fit was comparable to or greater than traditional risk factors such as smoking and diabetes (Mandsager et al., 2018). These were patients referred for testing, and the design shows association only.
Strength. A meta-analysis covering about 2 million men and women found that higher grip strength was associated with a 31 percent lower risk of death from any cause (García-Hermoso et al., 2018). Grip takes a few seconds to measure, and the pooled studies are observational.
Four capacities, four separate findings. Each test measured something different, and none of them could stand in for the others.
The Full Picture Beats Any Single Number
If each capacity carries its own information, the next question is whether measuring several of them tells you more than measuring your best one. A 2026 study in older adults looked at that question. A combined score across several physical fitness tests predicted survival at least as well as the best single test (Wu et al., 2026).
That is a modest finding, and I am keeping it modest. It does not say the combined score was dramatically better. It says the single best test, which for most people is the one they already train, did not give a fuller read than the combination. The participants were older adults, so the study describes the group most of my clients are heading toward rather than the one they are in now.
How to Find Your Blind Spot
Write down one current number for each of the four capacities. Most people fill in one or two quickly and stall on the rest.
- Flexibility: sit down on the floor and stand back up. Count every hand or knee you needed.
- Aerobic capacity: time a fixed walking or cycling route you can repeat, at an effort where you can still talk in full sentences.
- Carry a load: grip strength, or how long you can carry a pair of heavy dumbbells before your grip gives out.
- Equilibrium: stand on one leg with your eyes open, each side, and see whether you reach 10 seconds.
The line you could not fill in is your blind spot. That is where the next block of training goes, without dropping what already works. If the floor test is the one that surprised you, why fit people still struggle to get off the floor covers what that gap usually looks like and why it happens to people who train seriously.
These checks are low intensity for most people. Do the floor and balance tests with a counter or sturdy chair within reach, and if you have heart, joint or balance concerns, talk to your physician before testing.
A Good Sign, Read in Context
A strong lift is a good sign. Treat it as one line of the report, then go find the other three.
Which capacity have you never measured? That is your blind spot, and it is the one you would not see slipping.
What to Do This Week
- Write down one current number for each capacity: supports needed to sit on the floor and stand back up, one-leg stance time on each side (up to 10 seconds), time over a fixed walking or cycling route at conversational effort, and grip or a timed heavy dumbbell carry. Leave blank anything you cannot answer.
- Test the blank one first this week. Do the floor and balance checks on a soft surface with a counter or sturdy chair within reach.
- Add one short session aimed at your weakest or untested capacity, keep the rest of your training as it is, and retest the same way in four weeks. If you have heart, joint or balance concerns, talk to your physician first.
Sources
- Araujo CG, de Souza E Silva CG, Laukkanen JA, Fiatarone Singh M, Kunutsor SK, Myers J, Franca JF, Castro CL (2022). Successful 10-second one-legged stance performance predicts survival in middle-aged and older individuals. British Journal of Sports Medicine, 56(17), 975-980. doi:10.1136/bjsports-2021-105360 PMID 35728834.
- Araújo CGS, de Souza E Silva CG, Myers J, Laukkanen JA, Ramos PS, Ricardo DR (2026). Sitting-rising test scores predict natural and cardiovascular causes of deaths in middle-aged and older men and women. European Journal of Preventive Cardiology, 33(12), 2170-2178. doi:10.1093/eurjpc/zwaf325 PMID 40569873.
- Mandsager K, Harb S, Cremer P, Phelan D, Nissen SE, Jaber W (2018). Association of cardiorespiratory fitness with long-term mortality among adults undergoing exercise treadmill testing. JAMA Network Open, 1(6), e183605. doi:10.1001/jamanetworkopen.2018.3605 PMID 30646252.
- García-Hermoso A, Cavero-Redondo I, Ramírez-Vélez R, et al. (2018). Muscular strength as a predictor of all-cause mortality in an apparently healthy population. Archives of Physical Medicine and Rehabilitation, 99(10), 2100-2113.e5. PMID 29425700.
- Wiegmann S, et al. (2021). Longitudinal changes in muscle power compared to muscle strength and mass. Journal of Musculoskeletal and Neuronal Interactions, 21(1), 13-25. PMID 33657752.
- Wu MC, et al. (2026). Physical fitness and all-cause mortality in older adults. JAMA Network Open, 9(8), e2628227. PMID 42574013.
Client stories may combine details from more than one person, with identifying details changed for privacy. This article is educational and is not medical advice.
Also published in Built to Endure, our free weekly publication.