A single-blind, 2-arm randomized controlled trial investigating the benefits of Baduanjin exercise on middle-aged and older patients with schizophrenia. A total of 48 participants will be assigned to either 12 weeks of 60-minute two sessions per week Baduanjin exercise group or a brisk walking group. Primary outcomes are physical fitness and cognition functions. Secondary outcomes are dual task performance and daily functions. Evaluation will be completed at baseline, immediately after treatment and 4-week follow up.