Precision Vibration Therapy for Neuromuscular and Functional Improvement in Older Adults and Stroke Survivors

National Health Research Institutes, Taiwan80 enrolled

Overview

To address muscle weakness, sensory degradation, functional decline, and pain caused by geriatric syndromes in older adults and stroke survivors, this project proposes a series of studies aimed at improving neuromuscular performance, muscle strength, proprioceptive gain, functional outcomes, and pain relief through the use of a precise vibration system. In the first phase, a vibration exercise system will be implemented to recruit frail older adults and older adults with stroke for clinical trials. The goal is to verify the benefits of vibration intervention on limb muscle strength, proprioception, and movement function. In the third phase, quantitative pain assessments and related scales will be used to evaluate chronic pain thresholds and affected regions in older adults and stroke survivors, and to validate the effectiveness of vibration intervention in alleviating their pain.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

TRIPLE

Enrollment

Conditions

Aging Stroke

Interventions

Precision vibration therapy applied to either the upper or lower limb, depending on participant's functional deficit. Each session includes 20 minutes of vibration followed by 40 minutes of conventional rehabilitation (total 60 minutes). The vibration device delivers controlled frequency and amplitude for neuromuscular activation, proprioceptive enhancement, and functional improvement.

Conventional RehabilitationOTHER

Conventional rehabilitation therapy including task-specific training, strengthening, mobility, and balance exercises. Each session lasts 60 minutes. The therapy protocol is standardized across study sites and matched in duration and therapist contact time to the vibration therapy arms.

Eligibility

Sex: ALLMin age: 18 YearsMax age: 95 Years

Medical Language ↔ Plain English

Inclusion Criteria: Older Adults: * Meet two or more criteria of the Study of Osteoporotic Fractures (SOF) frailty index * Willing to participate in the study and comply with all study procedures * Able to wear and safely use the vibration device * Normal cognitive function (Mini-Mental State Examination \[MMSE\] score ≥ 23) * Presence of knee joint pain in the lower limbs Stroke Survivors: * Clinical diagnosis of ischemic or hemorrhagic stroke confirmed by a physician * Clinically stable stroke condition (i.e., not in an acute or unstable phase) * Brunnstrom stage ≥ III for the affected limb * Cognitive ability sufficient to follow study procedures (MMSE score ≥ 23) * Modified Ashworth Scale (MAS) score \< 3 for the paretic limb * Able to sit safely and participate in vibration or rehabilitation sessions for up to 60 minutes per visit * Willing and able to comply with all study procedures and provide written informed consent Exclusion Criteria: Older Adults: * Acute or chronic neurological injury involving the upper or lower limbs within the past 6 months * Acute or chronic musculoskeletal injury involving the upper or lower limbs within the past 6 months * History of surgery on the upper or lower limbs within the past 6 months Stroke Survivors: * Recurrent stroke during the current episode (i.e., acute re-stroke) or otherwise clinically unstable stroke presentation * Markedly elevated spasticity preventing isolated voluntary movement of the target limb (MAS score ≥ 3) * Hemianopsia or severe hemineglect that significantly interferes with task execution * Concomitant vestibular or cerebellar disorders that severely impair motor performance * Orthopedic or traumatic comorbidities causing significant pain or limiting safe participation during evaluation or intervention * Cognitive impairment attributable to stroke that precludes effective communication or adherence to the study protocol * Other neurological or psychiatric disorders judged likely to interfere with motor performance or study outcomes

Outcomes

Primary Outcomes

Fugl-Meyer Assessment (FMA) Score

The Fugl-Meyer Assessment evaluates motor recovery after stroke, including upper and lower extremity motor performance, coordination, and reflex activity. Higher scores indicate better motor function.