Inclusion Criteria:  Must living at their own home, Clinical diagnosis of mild or probable Alzheimer's Disease, Must be medical stable, Must be able to walk with or without assistive device without physical assistance of another person, Must be able to follow one-step commands, Family caregiver's must agree to participate at the training sessions.  Exclusion Criteria:  Severe vision and verbal impairment, Any serious orthopaedic condition, Any major neurologic or musculoskeletal comorbidity that might affect their functional mobility, Any limiting cardiac or pulmonary condition.