3. Physical Activity Level: Physical activity, not including the study-assigned exercise classes, will be determined at baseline and throughout the six-month study period. We will administer the valid and reliable Physical Activities Scale for the Elderly (PASE) questionnaire monthly. Designed for those aged 65 years and older, participants use a 12-item scale to self-report the average number of hours per day spent participating in leisure, household, and occupational physical activities over the previous seven-day period.