Multiple data will be collected:

Recruitment: Review the research assistant’s recruitment records and flow of participants in the study to calculate the participants’ recruitment rate and the reasons for non-participation.

Characteristics of eligible and included/non-included adults with stroke: Participants’ age, gender, marital status, educational level, stroke history, comorbidities, living condition and financial status will be extracted from the medical records.

Participant characteristics (completed vs dropout): Data such as age, gender, marital status, educational level, occupation, current financial aids received, type of housing, living condition, past and present medical history, assistive aids used, MoCA and MFAC scores will be extracted from the participants’ records.

Home journal: Participants will document details of their participation in FBB in the website or guidebook, including date, time, number of workouts performed, presence of dyspnoea, injuries or accidents.

Audio records: All home visits and virtual sessions of FBB, and volunteer training sessions will be audio recorded with the participants’ and the volunteers’ consent.

Qualitative evaluation: Focus group semi-structured exit interviews will be conducted by an independent research assistant with (1) all participants in the intervention group to elicit their experiences of participating in FBB, facilitators of and barriers to participating in FBB, perspectives on feasibility, acceptability and usefulness of FBB, changes in behaviours after FBB, impression of research experience and areas for enhancement; and (2) all volunteers to elicit their perceptions on the facilitators of and barriers to implementing FBB, perspectives on feasibility, acceptability and usefulness of FBB and observations of the participants’ participation in FBB.

Outcomes: All participants will be assessed at baseline (T0) and at immediately post-intervention (T1) (within 1 week after the intervention).

Balance: The 14-item Mini-Balance Evaluation Systems Test will be used.19 It measures four domains including the participants’ anticipatory postural adjustments, reactive postural control, sensory orientation and dynamic gait. All items are rated on a three-level scale (0=severe, 1=moderate, 2=normal). The summed total score is 0 to 28. A higher score represents better balance ability. The Cronbach alpha is 0.89–0.94.19

Balance confidence: The 16-item Activities-specific Balance Confidence Scale (Chinese version)20 will be adopted. The participants will rate their confidence in balance associated with performing 16 daily functional activities from 0% (absolutely no confidence) to 100% (fully confident). The summed total score is 0% to 100%. A higher score denotes higher confidence. The Cronbach alpha is 0.97.20

Gait: The 31-item Gait Assessment and Intervention Tool (G.A.I.T.) will be used to measure the participants’ gait: upper extremity and trunk movement control; trunk and lower extremity (stance phase); trunk and lower extremity (swing phase). Each item is scored from 0 (normal) to 3, with gradients of variation from normal. The total score ranges from 0 (normal gait) to 62 (greatest extent of gait deviations). G.A.I.T. demonstrates good intra-rater and inter-rater reliability.21

Walking endurance: The 6-minute walk test (MWT) will be performed in accordance with the American Thoracic Society guidelines.22 The distance walked, the time stopped and reason(s) for stopping prematurely will be recorded. The 6MWT, 12MWT and self-paced gait speed were all significantly highly correlated (r>0.90).23

Memory: The 11-item Rivermead Behavioural Memory Test–Third Version (Chinese version) will be used to measure the participants’ memory function for performing daily tasks. For each task, the scores range from 0 to 2 (0 point=error; 1 point=intermediate; 2 points=normal). The total score ranges from 0 to 254. The higher the score, the better the memory performance. The test demonstrates high inter-rater reliability. The correlation between performance on parallel forms is 0.67–0.84.24

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