Participants will received 12 sessions of Taekwondo-based fall prevention exercises. The exercise will be delivered twice a week for 6-weeks at the local recreational center. Each sessions includes three components: static and dynamic stretching warm-up, basic Taekwondo movement exercises, and kicking exercises. Static and dynamic warm-up was developed based on the evidence-based fall prevention exercise, The Otago Exercise Program. The basic Taekwondo movement exercises include three basic stances (walking, front, and horse riding stances) , and hand movements (low, middle, and high block, and middle punch). Kicking exercise includes target kicking using front kicks.

Participants will received the Live Strong and Safe Program on Fall Prevention online education program. It includes three modules. Module1 has three sessions that providing overview of fall prevention such as fall statistics, and preventable risk factors. Module2 has eight sessions that provides tips to ensure home safety for fall prevention. Module3 has 12 sessions that provides tips for personal safety from nutrition to mental health. Participants will complete this module at their own pace, and report their progress through email or text message each week.

Current fall-prevention exercise programs have a limitation in maintaining exercise adherence behaviors or increasing physical activities once the intervention is completed.2 The theory-based exercise program shows a higher adherence and retention rate.3,4 Taekwondo (TKD), one type of martial arts, can be a potential channel to deliver a theory-based fall prevention exercise program. Therefore, this study aims to test the feasibility of the potential 12 Taekwondo-based fall prevention exercise program for older adults and its preliminary efficacy using RCT.

The number of participants enrolled in the study per month; The number of participants who provided consent over the eligible participants.

8-item questionnaire with 7-point Likert (adapted from Physical Activity Enjoyment Scale). The response scale ranges from 1-7, spanning from the lowest degree (=1) to the highest degree (=7).

Using 5 points Likert Scale, and the response scale is (1): Completely disagree; (3) Neither agree or disagree; to (5): Completely agree. These items ask about participants' perceived program acceptability, appropriateness, and feasibility

Fidelity checklist scored by the independent rater

Number of sessions each participant attended / total sessions provided (i.e., 12)

Use 4-item questionnaire with 5-point Likert Scale. The response scale is (1): Strongly disagree; (3) Neither agree or disagree, to Maximum (5): Strongly agree

The number of grade 1 adverse events occurred across all exercise sessions.

Static and dynamic balance: Balance Error Scoring System (Outcome unit: number of errors occurred) Functional Gait Assessment (Outcome unit: a score ranging from 0-30) Muscle strength: 30-second chair-stand tests (Outcome unit: number of successful trials) Gait speed: Timed-Up and Go (Outcome unit: total time (seconds) to complete the task)