Participants assigned to this arm will receive a combined digital and educational intervention designed to promote behavior change in physical activity. In addition to a standard researcher-developed informational brochure describing the health benefits of exercise, participants will have access to a chatbot supported by artificial intelligence technology.

The chatbot will provide:

• Interactive, on-demand communication regarding physical activity and exercise
• Personalized educational messages tailored to participant needs and engagement patterns
• Motivational support and behavioral prompts to encourage adherence to physical activity recommendations

The brochure will provide standardized, non-interactive information on:

• The importance and health benefits of regular exercise
• General physical activity recommendations This intervention arm differs from comparator arms by incorporating an interactive, adaptive, and continuous AI-based support system.

Participants assigned to this arm will receive a standard researcher-developed informational brochure on the importance of exercise, but will not receive any digital or interactive intervention.

The brochure will provide standardized, non-interactive information on:

• The importance and health benefits of regular exercise
• General physical activity recommendations

In addition to receiving the brochure, participants will:

• Continue their usual daily activities and routine care
• Do not have access to the artificial intelligence-supported chatbot
• Not receive any personalized, interactive, or ongoing digital support or behavioral prompts during the study period This group differs from the experimental arm by receiving only static educational material, without any interactive or adaptive behavioral support system.

Participants will receive a combined behavioral intervention of an educational brochure developed by the Ministry of Health and access to an artificial intelligence (AI)-supported chatbot designed to promote physical activity.

The brochure will provide standardized written information on the importance of exercise, including general recommendations, health benefits, and basic guidance for an active lifestyle.

Participants will also have access to an AI-supported chatbot throughout the intervention period. The chatbot will deliver automated, interactive messages to increase physical activity, including motivational prompts, educational reinforcement, and behavior-change support.

The intervention will be delivered digitally via the chatbot platform, with no medication or physical devices required. The total duration and frequency of chatbot interactions will be continuous and on-demand during the study period.

Cognitive function will be assessed using the Mini-Mental State Examination (MMSE), a standardized tool evaluating orientation, memory, attention, language, and visuospatial abilities. Higher scores indicate better cognitive performance.

Physical activity level will be measured using the Physical Activity Scale for the Elderly (PASE), which assesses the frequency and duration of physical activity in older adults, including leisure, household, and occupational activities. Higher scores indicate higher physical activity levels.

Participant demographic and clinical data will be collected, including age, sex, education level, presence of chronic diseases, and medication use. These variables will be recorded only at baseline.