Deciding when to reduce a grab bar, take out a ramp, or remove a stair lift is not something a family should eyeball on a good day. As strength returns during Phase 3 of recovery, physical and occupational therapists lean on a small set of validated functional tests to answer the question objectively: is this person’s balance, mobility, and grip strength actually back to a safe baseline, or does it just feel that way? Understanding what these tests measure — and what scores they consider a safe threshold — helps families have a more informed conversation with a therapist before touching anything load-bearing in the home.
The Timed Up and Go Test
The Timed Up and Go (TUG) test is the most commonly used screening tool for this exact decision. A person starts seated in a standard armchair, stands up, walks about 3 meters (roughly 10 feet) at a comfortable pace, turns, walks back, and sits down again — all timed with a stopwatch. It is quick, requires no special equipment, and captures several things at once: lower-body strength, balance during a turn, and gait stability.
The cutoff scores therapists reference are fairly consistent across the research. Healthy older adults without major health issues typically complete the TUG in 6 to 11 seconds. A time longer than roughly 13.5 seconds has been identified as a threshold associated with meaningfully increased fall risk in some studies, and times above 20 to 30 seconds are consistently associated with serious mobility impairment and a likely ongoing need for assistance. A score under 20 seconds is generally considered a reasonable predictor of independence with basic transfers, like getting on and off a toilet or in and out of a chair — which is exactly the kind of transfer a grab bar or raised toilet seat was installed to protect.
Gait Speed: A Second, Independent Benchmark
Gait speed is measured separately from the TUG, usually by timing how long it takes to walk a fixed distance (commonly 4 or 6 meters) at a normal, comfortable pace. It is one of the simplest functional measures available, and it correlates strongly with a person’s overall physiologic reserve — which is part of why some clinicians refer to it informally as a vital sign.
Comfortable gait speeds around 0.8 meters per second are often flagged as a predictor of poorer clinical outcomes, and speeds around 0.6 meters per second are associated with a higher likelihood of further functional decline in someone already impaired. For context, normative comfortable gait speeds for community-dwelling adults in their 70s run roughly 1.1 to 1.3 meters per second, dropping to roughly 0.9 to 1.0 meters per second for adults in their 80s and 90s. A person walking meaningfully below their age-expected range is usually not a good candidate for pulling out a ramp or a hallway rail yet, even if they say they feel steady.
Grip Strength: Useful, But Not a Standalone Cutoff
Grip strength, measured with a handheld dynamometer, rounds out the picture. It reflects overall muscle health and plays a direct role in a person’s ability to catch themselves on a rail or hold onto a grab bar under load — not just whether the bar is present, but whether the person could actually use it in an emergency. Unlike the TUG or gait speed, there is no single universal grip-strength number that determines readiness to remove supports. Instead, therapists compare a person’s result against age- and sex-based norms; adults who fall below roughly the 20th percentile for their age and sex are generally considered to have low strength and a correspondingly higher risk profile. Grip strength is best read alongside the other two tests, not in isolation.
How the Three Tests Compare
| Test | What It Measures | General Threshold Worth Discussing With a Therapist |
|---|---|---|
| Timed Up and Go | Sit-to-stand strength, turning balance, gait | Under ~20 seconds generally supports independent basic transfers; above 20–30 seconds signals ongoing need for support |
| Gait Speed | Walking pace over a fixed distance | Speeds meaningfully below age-expected norms (roughly 0.6–0.8 m/s ranges cited in research) warrant caution |
| Grip Strength | Upper-body strength for catching a fall or gripping a rail | Compared against age/sex percentile norms rather than a fixed number |
Why This Matters Before You Reach for a Screwdriver
None of these tests exist to be run once and forgotten. A therapist typically retests periodically through recovery and looks at the trend, not just a single score, because a person can have a good day and a bad day. They also weigh factors these tests do not capture directly — vision changes, medication side effects, cognitive status, and the specific layout of the home itself. A hallway with good lighting and no throw rugs is a very different risk environment than a dim one, even for two people with identical TUG scores.
This is also why removal decisions are best sequenced, not made all at once. A family might reasonably decide a stair lift stays in place a few more weeks after gait speed and TUG numbers both clear their thresholds, simply because a fall on stairs carries a much higher consequence than a fall in a carpeted hallway. Matching the right level of support to the actual stage of recovery — rather than to how someone feels on a given afternoon — is the whole premise behind treating home modifications as something that scales up and down with a person’s real, measured condition, not a one-time installation.
If a therapist has cleared someone on these functional benchmarks and it is time to plan which supports come out first, working from measured results rather than guesswork keeps that reconditioning process safer and more deliberate.