One-minute sit-to-stand test tracks functional performance in Parkinson’s disease
A simple chair-based exercise test may offer clinicians a practical way to gauge function in Parkinson’s disease. In a cohort of 28 individuals with PD, the One-Minute Sit-to-Stand Test produced strong and consistent signals when compared with walking capacity and disease stage, while also showing excellent repeatability across a seven-day interval. The findings point to a bedside measure that captures lower-limb function, postural control, and the cumulative motor burden of PD without requiring specialized equipment.
The appeal of the test is obvious in rehabilitation settings. Repeated sit-to-stand movements depend on leg strength, balance, trunk control, and movement initiation, all of which can erode as PD progresses. A task like this compresses several elements of daily mobility into a single minute, making it far more than a routine fitness drill. For therapists and neurologic teams, a reliable tool that can be administered quickly has real value if it can reflect meaningful changes in function over time.
Correlation with walking capacity and disease stage
Concurrent validity was assessed against the 2-Minute Walk Test and the Hoehn and Yahr stage. The sit-to-stand score showed a strong positive correlation with the walking test, with r = 0.69 and p < 0.01. In clinical terms, better performance on repeated chair rises tracked with better short-distance ambulation, which is exactly what one would expect if the test is truly measuring functional mobility rather than isolated leg endurance alone.
A second relationship ran in the opposite direction. The sit-to-stand score had a moderate negative correlation with disease severity, with r = −0.58 and p < 0.01. As Hoehn and Yahr stage increased, performance fell. That pattern fits Parkinsonian pathophysiology: axial rigidity, bradykinesia, impaired postural adjustments, and reduced power generation all make a repeated stand-sit sequence progressively harder as the disease advances.
The numbers do not claim to replace a full neurologic examination. They do, however, suggest that one minute of repeated chair rises may summarize several clinically relevant dimensions of PD motor impairment in a way that is easy to reproduce during outpatient follow-up or rehabilitation visits.
Test-retest reliability was excellent across one week
The strongest result came from the reliability analysis. Participants repeated the same test after a seven-day interval, and the intraclass correlation coefficient reached 0.94 with a 95% confidence interval of 0.86–0.97. In practical terms, the test yielded very similar results on two separate occasions, which is essential if clinicians are going to use it to monitor change rather than random day-to-day variation.
This level of repeatability matters because Parkinson’s assessments often have to separate true functional change from fluctuations related to fatigue, medication timing, motivation, or context. A chair-based measure that remains stable across a short interval offers a useful benchmark. When scores shift meaningfully beyond expected noise, clinicians can be more confident that the change reflects altered motor performance rather than measurement inconsistency.
A single-minute task with this degree of stability can be attractive in clinics that need efficient functional testing. It does not demand treadmills, long corridors, or complex instrumentation. It also aligns with the way many rehabilitation teams already think about motor recovery: not only how far a patient can walk, but whether they can repeatedly rise from a chair, transfer safely, and maintain independence in everyday movement.
Why the sit-to-stand task fits Parkinson’s disease physiology
Parkinson’s disease impairs movement in a way that is often most visible during transitions. Standing up from a seated position requires anticipatory postural adjustments, coordinated hip and knee extension, forward trunk momentum, and enough speed to overcome inertia. Each of those steps can be slowed by bradykinesia and destabilized by rigidity or impaired balance responses. The sit-to-stand test therefore probes a vulnerable functional moment rather than a single muscle group.
It also captures the interplay between strength and motor control. A patient may have preserved basic muscle force yet still struggle because motor sequencing is inefficient or because the body cannot shift weight smoothly during the rise. That is one reason the test may map so well onto walking ability and disease stage. Both the walk test and the chair-rise task depend on coordinated whole-body movement, not just isolated joint action.
The same logic explains why the test may be especially useful in rehabilitation. Improvement in repeated sit-to-stand performance could reflect better transfer ability, better balance confidence, or better lower-extremity power. In a disorder where functional decline is often seen first in transitions, the measure has intuitive bedside value.
Small sample size limits certainty
The study included 28 individuals with PD, which keeps the evidence preliminary. The sample size is modest, and the findings should not be treated as definitive across all disease severities, medication states, or care settings. A larger cohort would be needed to determine how the test behaves across broader clinical subgroups and whether it can detect change after treatment or rehabilitation.
The design also focused on reliability and concurrent validity rather than responsiveness. It is not yet known how sensitive the test is to longitudinal progression, medication adjustment, or structured therapy. Those questions matter if the measure is to move from a convenient clinic exercise to a truly actionable outcome tool.
Even so, the core message is straightforward. The One-Minute Sit-to-Stand Test performed well against established functional anchors and remained highly repeatable over a week. For clinicians managing Parkinson’s disease, that combination makes it a credible candidate for routine functional assessment, especially where time and equipment are limited. The next step is not whether the test can be performed easily. The next step is whether it can reliably detect clinically meaningful change in larger and more diverse PD populations.