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Dose-Response and Phase-Specific Effects of Graded Cognitive Load on Functional Mobility in Older Adults: A Kinematic Analysis (CL)

5 settembre 2026 aggiornato da: Mostafa Abd-Elsamie Mohamed Abd-Elhamied seliem, Cairo University
This study will be conducted to investigate the effect of dose-response and phase-specific effects of Graded Cognitive Load affect on functional mobility in Older Adults

Panoramica dello studio

Stato

Non ancora reclutamento

Condizioni

Intervento / Trattamento

Descrizione dettagliata

Aging is associated with progressive changes in both the central nervous system and the musculoskeletal system, leading to declines in motor performance, balance, and functional mobility. These changes include reduced cortical processing efficiency, slower information processing speed, and alterations in sensorimotor integration, all of which contribute to decreased movement efficiency in older adults. Functional mobility, particularly walking and transitional movements, is no longer considered a purely automatic motor task, but rather a cognitively mediated activity that requires continuous interaction between attentional resources and motor control systems. Clinically, previous studies have demonstrated that dual-task performance is strongly associated with fall risk and mobility impairment in older adults, suggesting 6 its importance in functional assessment and rehabilitation planning.Despite these advances, most of the existing research has primarily focused on binary dual-task paradigms, comparing single-task versus dual-task conditions without considering different levels of cognitive demand. This approach limits the ability to understand whether cognitive-motor interference follows a dose-response relationship, where progressively increasing cognitive load produces graded deterioration in motor performance. Furthermore, while overall gait and mobility outcomes have been widely investigated, there is a lack of detailed evidence regarding how cognitive load influences specific phases of functional mobility tasks, such as sit-to-stand, gait, turning, and stand-to-sit transitions. Previous studies suggest that different movement phases may vary in their sensitivity to cognitive interference due to differences in biomechanical and postural control demands. However, this phasespecific behavior remains underexplored, particularly in the context of graded cognitive loading.

Therefore, there is a clear gap in the literature regarding the combined effect of graded cognitive load and phase-specific motor behavior during functional mobility tasks.

Tipo di studio

Interventistico

Iscrizione (Stimato)

60

Fase

  • Non applicabile

Contatti e Sedi

Questa sezione fornisce i recapiti di coloro che conducono lo studio e informazioni su dove viene condotto lo studio.

Contatto studio

Criteri di partecipazione

I ricercatori cercano persone che corrispondano a una certa descrizione, chiamata criteri di ammissibilità. Alcuni esempi di questi criteri sono le condizioni generali di salute di una persona o trattamenti precedenti.

Criteri di ammissibilità

Età idonea allo studio

  • Adulto
  • Adulto più anziano

Accetta volontari sani

No

Descrizione

Inclusion Criteria:

  • Age ≥ 60 years
  • Ability to ambulate independently without assistive devices
  • Ability to follow verbal instructions and perform dual-task activities
  • Medically stable and capable of participating in functional mobility assessment Cognitive function within normal range, defined as Mini-Mental State Examination (MMSE) score ≥ 24 out of 30, indicating absence of significant cognitive impairment .
  • Functionqal independence in basic activities of daily living, defined as Barthel Index score ≥ 90 out of 100
  • Body Mass Index (BMI) between 18.5 and 29.9 kg/m², as values ≥ 30 kg/m² (obesity) may adversely affect gait and balance performance.

Exclusion Criteria:

  • Any neurological disease that affects walking or balance, such as stroke or Parkinson's disease
  • Any musculoskeletal condition that limits lower-limb movement or affects normal walking patterns
  • Severe cognitive impairment defined as Mini-Mental State Examination (MMSE) score < 24
  • Visual, vestibular, or hearing problems that affect safe walking or balance control
  • History of lower-limb injury or surgery within the last 6 months
  • Serious medical conditions that make participation unsafe, such as unstable cardiac or respiratory disease

Piano di studio

Questa sezione fornisce i dettagli del piano di studio, compreso il modo in cui lo studio è progettato e ciò che lo studio sta misurando.

Come è strutturato lo studio?

Dettagli di progettazione

  • Scopo principale: Trattamento
  • Assegnazione: N / A
  • Modello interventistico: Assegnazione di gruppo singolo
  • Mascheramento: Nessuno (etichetta aperta)

Armi e interventi

Gruppo di partecipanti / Arm
Intervento / Trattamento
Sperimentale: Dual-Task Cognitive Loading Protocol
sixty Participants will perform the time-up-and-go test under four standardized experimental conditions designed to investigate the dose-response and phase-specific effects of graded cognitive load on functional mobility in older adults.

Participants will perform the TUG test under four standardized experimental conditions:

1. Single-Task Condition (Baseline) : Participants will perform TUG test without any additional cognitive task.

2-Low Cognitive Load Condition:Participants will perform the TUG test while simultaneously performing simple backward counting by ones starting from a randomly assigned number between 90 and 100.

3-Moderate Cognitive Load Condition :Participants will perform the TUG test while simultaneously performing serial backward counting by threes starting from a randomly assigned number between 90 and 100.

4-High Cognitive Load Condition:Participants will perform the TUG test while simultaneously performing serial subtraction by sevens (Serial 7s task) starting from a randomly assigned number between 90 and 100.

Cosa sta misurando lo studio?

Misure di risultato primarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Timed Up and Go (TUG) Completion Time
Lasso di tempo: up to one day
A smartwatch will be used to assess the completion time of the TUG test. The total time required to complete the TUG test under each cognitive load condition will be recorded in seconds and used as the primary measure of functional mobility performance. Increased TUG completion time will indicate deterioration in functional mobility under cognitive interference conditions
up to one day

Misure di risultato secondarie

Misura del risultato
Misura Descrizione
Lasso di tempo
sit-to-stand phase time
Lasso di tempo: up to one day
A smartwatch will be used to assess the time of sit-to-stand phase as a part of the TUG test
up to one day
walking phase time
Lasso di tempo: up to one day
The smartwatch will be used to assess the time of the walking phase as a part of TUG test
up to one day
turning phase time
Lasso di tempo: up to one day
The smartwatch will be used to assess the time of the turning phase as a part of TUG test
up to one day
stand-to-sit phase
Lasso di tempo: up to one day
The smartwatch will be used to assess the time of the stand-to-sit phase as a part of TUG tes
up to one day
gait speed
Lasso di tempo: up to one day
A sagittal-plane video-based kinematic analysis system will be used to evaluate gait speed.ormal gait speed for healthy adults generally ranges from 1.2 to 1.4 meters per second (m/s)
up to one day
step length
Lasso di tempo: up to one day
A sagittal-plane video-based kinematic analysis system will be used to evaluate step length. The normal walking step length is about 2.5 feet (75 to 79 cm) for men and 2.2 feet (66 to 69 cm) for women
up to one day
cadence
Lasso di tempo: up to one day
A sagittal-plane video-based kinematic analysis system will be used to evaluate cadence. A normal comfortable walking cadence for healthy adults generally ranges from 100 to 120 steps per minute
up to one day
step time
Lasso di tempo: up to one day
A sagittal-plane video-based kinematic analysis system will be used to evaluate step time. the normal step time for a healthy adult walking at a comfortable, self-selected speed is approximately 0.5 seconds per single step
up to one day
turning duration
Lasso di tempo: up to one day
A sagittal-plane video-based kinematic analysis system will be used to evaluate turning duration.For healthy, normal adults, the average turning durations typically fall into these ranges from 1.4 to 1.5 seconds
up to one day
peak trunk flexion angle
Lasso di tempo: up to one day
sagittal-plane video-based kinematic analysis system will be used to evaluate peak trunk flexion.Studies show that actively flexing the trunk increases peak angles (reaching higher ranges like an added 47° in intentional flexed landings vs. preferred landings) which helps absorb impact and protect the knees
up to one day
peak hip flexion angle
Lasso di tempo: up to one day
the sagittal-plane video-based kinematic analysis system will be used to evaluate peak hip flexion angle. it should be from 130-140 degree.
up to one day
peak knee flexion angle
Lasso di tempo: up to one day
The sagittal-plane video-based kinematic analysis system will be used to evaluate peak knee flexion angle. it should be from 120-150 degree.
up to one day

Collaboratori e investigatori

Qui è dove troverai le persone e le organizzazioni coinvolte in questo studio.

Sponsor

Studiare le date dei record

Queste date tengono traccia dell'avanzamento della registrazione dello studio e dell'invio dei risultati di sintesi a ClinicalTrials.gov. I record degli studi e i risultati riportati vengono esaminati dalla National Library of Medicine (NLM) per assicurarsi che soddisfino specifici standard di controllo della qualità prima di essere pubblicati sul sito Web pubblico.

Studia le date principali

Inizio studio (Stimato)

20 settembre 2026

Completamento primario (Stimato)

20 febbraio 2027

Completamento dello studio (Stimato)

20 febbraio 2027

Date di iscrizione allo studio

Primo inviato

5 settembre 2026

Primo inviato che soddisfa i criteri di controllo qualità

5 settembre 2026

Primo Inserito (Effettivo)

10 settembre 2026

Aggiornamenti dei record di studio

Ultimo aggiornamento pubblicato (Effettivo)

10 settembre 2026

Ultimo aggiornamento inviato che soddisfa i criteri QC

5 settembre 2026

Ultimo verificato

1 settembre 2026

Maggiori informazioni

Termini relativi a questo studio

Altri numeri di identificazione dello studio

  • P.T.REC/012/006633

Informazioni su farmaci e dispositivi, documenti di studio

Studia un prodotto farmaceutico regolamentato dalla FDA degli Stati Uniti

No

Studia un dispositivo regolamentato dalla FDA degli Stati Uniti

No

Queste informazioni sono state recuperate direttamente dal sito web clinicaltrials.gov senza alcuna modifica. In caso di richieste di modifica, rimozione o aggiornamento dei dettagli dello studio, contattare register@clinicaltrials.gov. Non appena verrà implementata una modifica su clinicaltrials.gov, questa verrà aggiornata automaticamente anche sul nostro sito web .