Table 1.

Intervention description aligned with the Template for Intervention Description and Replication (TIDieR) guidance

TIDieR Checklist Item
Why	Undertaking sufficient physical activity and healthy eating is critical to prevent people with lived experience of or at risk of cardiovascular disease (CVD) from experiencing future heart problems. However, most people with or at risk of CVD fail to initiate or sustain these long-term health behaviours. This increases risks of future heart conditions and premature death. CVD is more common in men, but they are less likely than women to access interventions to help them manage their weight or improve their health behaviours.
What (materials)	Men participating will receive: a wrist worn physical activity monitor, a sports club team shirt and a participant workbook with educational content about nutrition, physical activity and health behaviour change (which is also covered in the face-to-face sessions). Coaches will receive a detailed intervention delivery guide and educational resources (eg, wallet cards to assess food labels) to support delivery of the weekly sessions. Coaches will use sports equipment (eg, Australian Football League and rugby league balls) from their respective clubs. The participant workbook and coach session delivery guides have previously been used in the Australian Fans in Training (Aussie-FIT) pilot studies. The participant workbook and coach session delivery guide were developed (and educational materials sourced), adapted from resources available from: Football Fans in Training programme, www.ffit.org.uk; Heart Foundation Australia, www.heartfoundation.org.au; Australian Government Department of Health, National Health and Medical Research Council, www.eatforhealth.gov.au; Alcohol Think Again, www.alcoholthinkagain.com.au; and Cancer Council Western Australia (WA), www.cancerwa.asn.au. Minor adaptations have been made to these resources to reflect the target population (men with or at risk of CVD) and the primary outcome (physical activity) in this trial, and to incorporate consumer and stakeholder feedback in WA, Queensland (QLD) and the Northern Territory (NT).
What (procedures)	Participants will attend 12 group sessions at their club that incorporates physical activity and workshop style education. The education involves practical activities and discussions to help men understand why and how to improve their diet (eg, interpreting food labels, portion sizes, meal planning, eating out) and physical activity habits (eg, understanding exercise intensities, safe strength training, decreasing sedentary time). Men will be encouraged to use behaviour change techniques (eg, self-monitoring, goal setting and problem-solving) to help put the recommendations into practice. Participants take part in physical activity within the sessions that starts off slowly in the initial weeks and gradually builds up over the course of the programme. Activities men participate in include ball skills and circuit training similar to that undertaken by Australian football and rugby league players but modified to be safe for each man’s abilities (eg, ball skill drills restricted to walking). Men are encouraged to self-monitor walking, gradually increasing steps/day throughout the 12 weeks.
Who provides	Coaches will be recruited from 10 sports clubs in Perth, Darwin and Brisbane. Aussie-FIT coaches will be already embedded in their respective clubs, knowledgeable about Australian Football or Rugby League, and have experience of leading physical activity or sports coaching sessions. Coaches should have good communication skills and the ability to help foster a supportive atmosphere with camaraderie between participants. Accredited exercise physiologists (AEPs), or other suitably qualified/accredited health professionals, will act as an assistant coach and cofacilitate programme delivery. They will support the coach by undertaking any required health monitoring of participants (eg, blood pressure checks), provide advice on safe exercise and provide first aid, if required. Club coaches and AEPs will be trained by the research team in the core programme content (physical activity, nutrition, motivation, behaviour change). The training is delivered face to face and comprises approximately 15 hours of interactive learning content and opportunities to practice session deliveries and receive feedback from the research team and peers.
How	The intervention will be delivered face to face to groups of approximately 16 men. Coaches are encouraged to use a communication style that supports psychological need satisfaction for autonomy, competence and relatedness in relation to physical activity and eating behaviours.
Where	The programme will be delivered in Australian Football (WA and NT) and rugby league (QLD) settings. This will include a suitable space for the educational programme component (eg, indoor clubroom) and access to the pitch/oval for physical activity. In some circumstances, outdoor spaces may be utilised to deliver the educational content and indoor spaces may be used for physical activity (eg, if there is gym access or in adverse weather conditions).
When and how much	Participants will attend 12, weekly, 90 min sessions. Aussie-FIT encourages gradual increases in moderate to vigorous physical activity levels outside of the weekly sessions in daily life.
Tailoring	The Aussie-FIT sessions and resources are informed by the best available evidence and population recommendations for age and CVD risk management (eg, Australian guide to healthy eating, physical activity guidelines and National Heart Foundation recommendations). The programme is not prescriptive in terms of physical activity and dietary changes the men make outside of the weekly sessions. Men are supported to self-monitor their diet and physical activity behaviours, then make their own education-informed decisions on setting goals that are relevant to them. Health behaviour change goals that are self-determined are more likely to be sustainable. Personalised feedback on goals men set is provided by coaches and peers in weekly sessions throughout the programme. Targeted behaviours for goal setting include portion size control, reduction of sugary drinks and energy dense foods, reduction in alcohol consumption, gradual increases in physical activity and reduced sedentary time. Men participating in Aussie-FIT will have varying physical fitness levels and health conditions. Throughout the programme AEPs and coaches will modify the physical activity within the sessions to suit men with differing physical capabilities. AEPs and coaches will be aware of pre-existing conditions and will interact with and observe participants during the programme sessions and tailor activities as required.