Inspiring Seniors Toward Exercise Promotion

Inclusion Criteria: * At least 65 years old. * Ambulatory/capable of walking for 6 minutes without pain or aid such as a walker/cane. * Able to speak and read English. * Healthy enough to exercise at moderate intensity with or without medical clearance by a primary care physician. * Living in the community for the duration of the study (6 months). * Having a reliable means of transportation. * Having a safe place (at least 6 feet by 6 feet of open space) at home for unsupervised exercise training. * Having no diagnosis or symptoms of cognitive impairment. * Having no symptoms of suicidal ideation and not meeting criteria for depressive disorder. * Physically low-active by doing \< 60 min/week of moderate-intensity aerobic exercise and no strength training for the last 3 months. Exclusion Criteria: * Diagnosis of neurological disorder or spinal cord disorder. * Known exercise contraindications. * Current cancer treatment. * Stroke or neural impairment in the past 6 months. * Hip/knee/spinal fracture or surgery in the past 6 month. * Unable or unwilling to attend intervention classes 3x/week in Months 1-2 and 1x/week in Months 3-4. * Currently participating in any other physical activity or fitness-related research study. * Use of medication for Alzheimer's disease. * Change in dosage of medications prescribed for anxiety or depression within the previous 6 months. * Regularly drink \> 14 alcoholic beverages a week or current illicit drug use. * Having no diagnosis or sympto…