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Trial registered on ANZCTR


Registration number
ACTRN12625001109493
Ethics application status
Approved
Date submitted
5/09/2025
Date registered
10/10/2025
Date last updated
10/10/2025
Date data sharing statement initially provided
10/10/2025
Type of registration
Prospectively registered

Titles & IDs
Public title
Effectiveness of physical activity coaching for rural older adults
Scientific title
Effectiveness of physical activity coaching for rural older adults: a randomised controlled trial
Secondary ID [1] 315263 0
Nil known
Universal Trial Number (UTN)
Trial acronym
Linked study record

Health condition
Health condition(s) or problem(s) studied:
Physical inactivity 338716 0
Quality of life 338717 0
Social isolation 338718 0
Condition category
Condition code
Public Health 335016 335016 0 0
Health service research
Mental Health 335017 335017 0 0
Other mental health disorders

Intervention/exposure
Study type
Interventional
Description of intervention(s) / exposure
Participants in the intervention group will receive a structured telephone-based physical activity coaching program (Healthy4U for older adults) incorporating motivational interviewing (MI) and cognitive behaviour therapy (CBT) strategies.

Materials: Allied health professionals will distribute recruitment fliers, and participants complete the PAR-Q+ safety screening prior to enrolment.

Procedures/activities: The program focuses on helping participants identify meaningful physical activity goals, enhance self-efficacy, problem-solve around barriers, and develop strategies for maintaining activity. Sessions 1–3 emphasise motivational interviewing for initiating behaviour change, while sessions 4–5 integrate MI-CBT to support maintenance.

Who delivers it: Coaching is delivered by a registered healthcare practitioner (AHPRA accredited) with specific training in MI-CBT. Practitioners receive supervision from experienced clinicians who have delivered previous Healthy4U trials.

Mode of delivery: All coaching is conducted by telephone, one-to-one with participants.

Frequency and duration: Each participant receives five coaching sessions of ~15–20 minutes:
- Four sessions over a six-week period
- One booster session at week 11 post-baseline.
Attendance rates will be measured using an attendance checklist.

Setting: Participants are older adults living in rural/regional Victoria. Sessions are conducted remotely from Bendigo Health.

Dose/intensity: Total intervention dose is approximately 75–100 minutes of coaching over three months.
Intervention code [1] 331871 0
Behaviour
Intervention code [2] 331872 0
Lifestyle
Comparator / control treatment
Comparator: Control group participants receive a single “check-in” phone call at week three (no coaching content). After trial completion, they are offered three optional coaching calls over 12 weeks.
Control group
Active

Outcomes
Primary outcome [1] 342643 0
Physical activity (minutes per day of moderate-to-vigorous physical activity)
Timepoint [1] 342643 0
Outcome measures will be completed at baseline (pre-intervention), 3 months and 6 months (primary timepoint) post-baseline.
Secondary outcome [1] 451656 0
Self-efficacy for physical activity
Timepoint [1] 451656 0
Outcome measures will be completed at baseline (pre-intervention), 3 months and 6 months (primary timepoint) post-baseline.
Secondary outcome [2] 451657 0
Quality of life (physical and mental health components)
Timepoint [2] 451657 0
Outcome measures will be completed at baseline (pre-intervention), 3 months and 6 months post-baseline.
Secondary outcome [3] 451658 0
Body mass index (BMI)
Timepoint [3] 451658 0
Outcome measures will be completed at baseline (pre-intervention), 3 months and 6 months post-baseline.
Secondary outcome [4] 451659 0
Loneliness
Timepoint [4] 451659 0
Outcome measures will be completed at baseline (pre-intervention), 3 months and 6 months post-baseline.
Secondary outcome [5] 451660 0
Social isolation
Timepoint [5] 451660 0
Outcome measures will be completed at baseline (pre-intervention), 3 months and 6 months post-baseline.
Secondary outcome [6] 451661 0
Mental wellbeing
Timepoint [6] 451661 0
Outcome measures will be completed at baseline (pre-intervention), 3 months and 6 months post-baseline.
Secondary outcome [7] 452126 0
Barriers and enablers for participating in the coaching sessions
Timepoint [7] 452126 0
After study completion - 6 months

Eligibility
Key inclusion criteria
Aged 65 years or older; or 50 years and older for Aboriginal and Torres Strait Islander peoples, or individuals with a disability (as per Community Allied Health Services eligibility)

Reside in a rural or regional postcode in Victoria

Insufficiently physically active, defined as engaging in less than 150 minutes of moderate-to-vigorous physical activity per week (self-reported)

Have access to a telephone
Minimum age
18 Years
Maximum age
No limit
Sex
Both males and females
Can healthy volunteers participate?
No
Key exclusion criteria
Deafness or significant hearing impairment

Neurological disorder causing disability

Active, serious mental illness (e.g., psychosis)

Learning disability or dementia

Registered blind

Inability to mobilise independently

Advanced cancer

Study design
Purpose of the study
Prevention
Allocation to intervention
Randomised controlled trial
Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
Allocation will be concealed using sequentially numbered, sealed opaque envelopes prepared by research staff not involved in randomisation schedule development or statistical analysis.
Methods used to generate the sequence in which subjects will be randomised (sequence generation)
A computer-generated randomisation sequence with permuted blocks of variable size will be used to allocate participants in a 1:1 ratio to intervention or control groups.
Masking / blinding
Blinded (masking used)
Who is / are masked / blinded?



The people analysing the results/data
Intervention assignment
Other design features
Phase
Not Applicable
Type of endpoint/s
Efficacy
Statistical methods / analysis
Analyses will follow the intention-to-treat principle. A series of 3 × 2 mixed-model ANOVAs will be conducted to compare differences in primary and secondary outcomes between groups across time points (baseline, 12 weeks, and 6 months).

For participants with missing data at 12 weeks or 6 months, a last-observation-carried-forward approach will be applied. Sensitivity analyses using multiple imputation methods will be undertaken to assess robustness of results.

Exploratory qualitative data from semi-structured interviews (intervention group subsample) will be analysed thematically using NVivo software to identify barriers, facilitators, and acceptability of the program.

Recruitment
Recruitment status
Not yet recruiting
Date of first participant enrolment
Anticipated
Actual
Date of last participant enrolment
Anticipated
Actual
Date of last data collection
Anticipated
Actual
Sample size
Target
Accrual to date
Final
Recruitment in Australia
Recruitment state(s)
VIC

Funding & Sponsors
Funding source category [1] 319832 0
Hospital
Name [1] 319832 0
Bendigo Health
Country [1] 319832 0
Australia
Primary sponsor type
Government body
Name
Bendigo Health Care Group
Address
Country
Australia
Secondary sponsor category [1] 322358 0
None
Name [1] 322358 0
Address [1] 322358 0
Country [1] 322358 0

Ethics approval
Ethics application status
Approved
Ethics committee name [1] 318390 0
Bendigo Health Human Research Ethics Committee
Ethics committee address [1] 318390 0
Ethics committee country [1] 318390 0
Australia
Date submitted for ethics approval [1] 318390 0
16/06/2025
Approval date [1] 318390 0
04/09/2025
Ethics approval number [1] 318390 0
LRSSA /119510/BH-2025-490691(v1)

Summary
Brief summary
Trial website
Trial related presentations / publications
Public notes

Contacts
Principal investigator
Name 144026 0
Dr Stephen Barrett
Address 144026 0
Bendigo Health, 100 Barnard St. Bendigo, VIC, 3550
Country 144026 0
Australia
Phone 144026 0
+61 419599708
Fax 144026 0
Email 144026 0
Contact person for public queries
Name 144027 0
Stephen Barrett
Address 144027 0
Bendigo Health, 100 Barnard St. Bendigo, VIC, 3550
Country 144027 0
Australia
Phone 144027 0
+61 419599708
Fax 144027 0
Email 144027 0
Contact person for scientific queries
Name 144028 0
Stephen Barrett
Address 144028 0
Bendigo Health, 100 Barnard St. Bendigo, VIC, 3550
Country 144028 0
Australia
Phone 144028 0
+61 419599708
Fax 144028 0
Email 144028 0

Data sharing statement
Will the study consider sharing individual participant data?
No


What supporting documents are/will be available?

No Supporting Document Provided


Results publications and other study-related documents

Documents added manually
No documents have been uploaded by study researchers.

Documents added automatically
No additional documents have been identified.