Influence of Square-stepping Exercise on Brain Activation, Cognitive Function and Physical Performance in Frail Elders With MCI

Inclusion Criteria: * Age between 65 and 90 years old * Presence of at least 1 characteristic of the Fried frailty criteria * Mini-mental state examination score equal to or more than 24 * Montreal Cognitive Assessment score less than 26 * Ability to walk independently for 1 min without assistive devices Exclusion Criteria: * Central nervous system disorders (such as stroke, Parkinson's disease, spinal cord injury) * Any unstable physical condition, psychiatric disorder, and other neurological disorder or diagnosed with learning disability which may affect participating this study