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Background: This study investigated the effects of tai chi on body composition, self-efficacy, and life satisfaction of older adults in a Korean community.

Methods: A randomized, control group pretest-posttest, experimental design was used to investigate 42 adults aged 65 years or older. Subjects were divided into an experimental group that underwent tai chi training for 6 weeks (n = 20) and a control group that did not (n = 22). Body composition, selfefficacy, and life satisfaction were measured before and after a 6-week tai chi intervention program (5 days/week).

Results: Compared to the control group, the experimental group showed significant reductions in body mass index (BMI) (p < 0.004) and body fat (p < 0.001) and significant increases in skeletal muscle mass (p < 0.001) and life satisfaction (p < 0.001). Self-efficacy increased in the experimental group but was not significantly different from that of the control group (p < 0.265).

Conclusion: Tai chi is an effective exercise intervention that may improve body composition and life satisfaction for older adults.