Immediate Effects of Low-Intensity Plantar Proprioceptive Stimulation of the Affected Limb on Stable Versus Unstable Surfaces on Modified Sit-to-Stand Time and Gait Following Total Knee Arthroplasty

NCT07840768 · tracked via the Priya Life Science South Korea tracker

Sponsor

Sahmyook University

Phase

Not applicable

Started

2026-09-07

Last updated

2026-09-25

Condition(s) studied

Total Knee ArthroplastyPostoperative Rehabilitation

Investigational drug(s) / intervention(s)

Low-Intensity Plantar Proprioceptive Stimulation on an Unstable SurfaceLow-Intensity Plantar Proprioceptive Stimulation on a Stable Surface

Low-Intensity Plantar Proprioceptive Stimulation on an Unstable Surface: Participants will perform low-intensity plantar proprioceptive stimulation while seated with the operated foot placed on a balance pad. They will apply low-intensity pressure through the operated foot for 5 seconds followed by 5 seconds of relaxation. The cycle will be repeated 12 times for approximately 2 minutes.

Low-Intensity Plantar Proprioceptive Stimulation on a Stable Surface: Participants will perform the same low-intensity plantar proprioceptive stimulation while seated with the operated foot placed on a firm surface. They will apply low-intensity pressure through the operated foot for 5 seconds followed by 5 seconds of relaxation. The cycle will be repeated 12 times for approximately 2 minutes.

Study summary

This randomized controlled study will investigate the immediate effects of low-intensity plantar proprioceptive stimulation performed on an unstable versus stable surface in patients during early rehabilitation after unilateral total knee arthroplasty (TKA).

Participants will be randomly assigned to either an unstable-surface group or a stable-surface group. While seated, participants will apply low-intensity pressure through the operated foot using a standardized repeated pressing task. The unstable-surface group will perform the task with the operated foot placed on a balance pad, whereas the stable-surface group will perform the same task on a firm surface.

The primary outcome will be the time required to perform a modified sit-to-stand task. Secondary outcomes will include walking performance, pain, and knee range of motion. The study aims to determine whether providing additional plantar proprioceptive input through an unstable surface can produce an immediate improvement in functional performance during early rehabilitation after TKA.

Eligibility

Sex

ALL

Min age

60 Years

Max age

79 Years

Healthy volunteers

Inclusion Criteria: * Age 60 to 79 years. * Patients who underwent unilateral total knee arthroplasty (TKA) and are 7 to 14 days postoperatively at the time of study participation. * Patients who have begun independent gait training using a walker. * Able to understand the purpose of the study and provide written informed consent. Exclusion Criteria: * Bilateral total knee arthroplasty. * Severe neurological disease or severe peripheral nervous system disorder. * Orthostatic hypotension. * Postoperative cognitive impairment that makes it difficult to understand instructions or perform the study tasks.

Primary outcome measure(s)

Change in Modified Sit-to-Stand (mSTS) Time — Baseline and immediately after the single-session intervention
Time required to complete one modified sit-to-stand (mSTS) task will be measured in seconds. The task will be video-recorded using a smartphone at 60 frames per second and analyzed using Kinovea software. Time will be calculated from seat-off to attainment of a fully upright standing position. Participants will be allowed to use upper-extremity support as needed. Measurements will be performed before and immediately after the intervention. A shorter time indicates better sit-to-stand performance.

Trial sites (1)

Facility	City	Region	Status
Choiseon Orthopedic Clinic	Naju	Jeollanamdo

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Official registry record

This page summarises publicly available registry data for informational purposes — not medical advice. Eligibility is determined by each study team; patients should discuss participation with their clinician.

View NCT07840768 on ClinicalTrials.gov ↗ ← All trials in South Korea