Cognitive Task-Based Walking Effects on Cognition, Mood, Sleep, and Quality of Life in Older Adults With Brain Fog

Inclusion Criteria: * Aged 65 years or older * Self-reported experience of brain fog symptoms (e.g., reduced attention, concentration, or -mental clarity) for at least the past 4 weeks * Moderate or higher brain fog severity as determined by the Turkish version of the Brain Fog Scale * Preserved global cognitive function (Montreal Cognitive Assessment score ≥20) * Ability to walk independently, with or without an assistive device * Ability to communicate verbally and follow instructions * No changes in medication and no acute illness within the past 4 weeks * Willingness to participate and provide written informed consent Exclusion Criteria: * Diagnosed neurodegenerative or neurological disorders (e.g., Alzheimer's disease, stroke, or other major neurological conditions) * Severe psychiatric disorders * Medical contraindications to physical exercise * Severe visual or hearing impairments interfering with assessment or exercise participation * Inability to adhere to or complete the study procedures and exercise program