## 2 Materials and Methods
### Study Design and Participants
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Steps** & **Task’s Purpose** & **Time** & \begin{tabular}{c} **Script from** \\ **Scriptpedia** \\ \end{tabular} & **Actions** & **Participants** \\ \hline \multirow{4}{*}{A.} & Review the main risk & & & Create a list of HI risk & \\  & factors for acute & & & factors for further & \\  & hamstring injury (HI) & - & - & discussion in the & \\  & from systematic reviews & & & group model building & the modeling Team \\  & and relevant literature & & & workshops. & \\ \hline B & Group Model Building Workshops & & & & \\ \hline \multirow{4}{*}{B1} & Discuss list of risk & & & & \\  & factors for acute HI & 120\({}^{\prime}\) & Variable elicitation & \begin{tabular}{c} Participants discuss \\ the variables and \\ remove or add \\ variables. \\ \end{tabular} & \begin{tabular}{c} Modeling team \\ and two members \\ of the stakeholders’ \\ team \\ \end{tabular} \\ \hline \multirow{4}{*}{B1.1} & Create a CLD for acute & & & & \\  & HI (HI-CLD) based on & & & & \\  & literature and the & - & - & \begin{tabular}{c} Formulation of an \\ initial perspective of \\ HI risk factors \\ interaction. \\ \end{tabular} & One member of the \\  & modeling team \\  & previous GMB session & & & & \\ \hline \multirow{4}{*}{B2} & Discuss and review the & 1. Causal Mapping & & & \\  & HI-CLD with the & 120\({}^{\prime}\) & \begin{tabular}{c} with Seed Structure, 2. \\ Model Review 3. Next \\ Steps and Closing \\ \end{tabular} & \begin{tabular}{c} Review the HI-CLD \\ and propose \\ corrections. \\ \end{tabular} & Modeling team \\  & & & \\ \hline \multirow{4}{*}{B3} & Review HI-CLD with & & 1. Model Review, 2. & & \\  & the modeling team & 60\({}^{\prime}\) & \begin{tabular}{c} Next Steps and \\ Closing \\ \end{tabular} & \begin{tabular}{c} Review the HI-CLD \\ after the corrections \\ and prepare the \\ following steps. \\ \end{tabular} & Modeling team \\ \hline \multirow{4}{*}{B4} & Presentation of CLD to & & 1 Modeling Project & \begin{tabular}{c} Presentation of \\ HI-CLD to \\ stakeholders \\ \end{tabular} & Modeling team \\  & stakeholders and & 120\({}^{\prime}\) & \begin{tabular}{c} Community \\ Presentation, 2. Model \\ Review \\ \end{tabular} & \begin{tabular}{c} stakeholders. \\ Discussion about the \\ HI-CLD and the \\ included variables. \\ \end{tabular} & \
\begin{tabular}{c} Modeling team \\ the Stakeholders’ \\ team \\ \end{tabular} \\ \hline \multirow{4}{*}{B5} & Review the HI-CLD and & & & & \\  & incorporation of & & & \\  & stakeholders’ points of & 90\({}^{\prime}\) &
\begin{tabular}{c} Combarizing the \\ inputs from \\ stakeholders. \\ \end{tabular} & Modeling team \\  & view & & & \\ \hline \hline \end{tabular}
\end{table} 
Table 1: GMB process for the formulation of HI-CLD. in detail in the following subsections. The core modeling team engaged the stakeholders, whose main role was to discuss the HI-CLD and provide their point of view about the HI problem. The core modeling team was responsible for collecting stakeholders' perspectives and incorporating them into the HI-CLD. The core modeling team included an academic physical therapist with expertise in sports injury prevention and rehabilitation, as evidenced by relevant published literature; two clinical physical therapists pursuing their Ph.D. studies in sports injury prevention; and one academic expert in SD modeling. Regarding the stakeholders' team, the four members who participated in this study resulted from eight possible stakeholders who were initially approached via personal contact, phones, and email to participate in the GMB workshops. The group of stakeholders initially approached was selected for its diverse expertise related to athlete health, including sports physiotherapists, conditioning trainers, orthopedic surgeons, and sports psychologists. The main criterion for including stakeholders in the GMB workshops was to be professionals who work with different aspects of athlete health.