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
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 .
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
Single group
Dual-Task Cognitive Loading Protocol
Other interventionParticipants 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.
Timed Up and Go (TUG) Completion Time
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
sit-to-stand phase time
A smartwatch will be used to assess the time of sit-to-stand phase as a part of the TUG test
walking phase time
The smartwatch will be used to assess the time of the walking phase as a part of TUG test
turning phase time
The smartwatch will be used to assess the time of the turning phase as a part of TUG test
stand-to-sit phase
The smartwatch will be used to assess the time of the stand-to-sit phase as a part of TUG tes
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