## 2 Materials and Methods
### Search Strategy  
The search and selection process for this systematic review was carried out through three specialized electronic databases in the field of Physical Activity and Sport Sciences: PubMed, SCOPUS, and Web Of Science. All records found were exported in a comma-separated values (CSV) format to a Microsoft(r) Excel document and in Research Information Systems (RIS) formats (PubMed and Web of Science), and directly (SCOPUS) to MENDELY, the bibliographic manager used in this review. Keywords and their synonyms (\"football\", \"socer\", \"para-football\", \"football-7-a-side\", \"match\", \"competition\", \"performance\", \"activity\", \"cereb palsy \" and \"cereb paralysis\") were entered in various combinations using boolean operators, selected using the PICOS search strategy (i.e., Population, Intervention, Comparator, Outcomes, Study design). Additionally, the bibliography (references) section of the selected articles was manually reviewed to detect potentially eligible articles not captured by the electronic searches. The final search strategy was carried out using the following combination of terms: (\"football\"  OR \"soccer\"  OR \"para-football\"  OR \"football-7-a-side\") AND (\"match\"  OR \" competition\" OR \"performance\" OR \"activity\") AND (\"cereb palsy\"  OR \"cereb paralysis\"). A time restriction between 2000 and 2023 was established for the selection of studies. This search process was carried out independently by two authors (S.A.-H. and A.R.-F), and in cases that generated discrepancies, a third author (D.C.) was consulted. The search was carried out on 31 January 2023. The results obtained in the different databases were exported in a CSV sheet for later analysis in Microsoft(r) Excel (Microsoft Corporation, Readmon, WA, USA), where the articles were classified by title, author/s, date of publication, and database. This classification made it possible to detect duplicate/triplicate records (n = 45). A review of the title, abstract, and list of references for each of the studies was carried out to filter them and detect potentially relevant articles to include in the review. Subsequently, the complete versions of the included articles were reviewed to detect those that met the inclusion criteria established according to the PICOS strategy (Population: para-footballers with cerebral palsy; Intervention: data registered during an official match; Outcome: measures of physical and physiological responses; study design: an observational and descriptive design) (Table 1). Additionally, those studies that were not written in English, as well as conferences, abstracts, letters to the editor, errata, narrative reviews, systematic reviews, and meta-analyses, were excluded from our review. \begin{table}
\begin{tabular}{c c c} \hline
**PICOS** & **Inclusion Criteria** & **Exclusion Criteria** \\ \hline Population & Para-footballers with cerebral palsy & Footballers without cerebral palsy and \\ Intervention & Data during an official match & para-athletes for other sports than soccer \\ Comparator & & Data during simulated match or small sided games \\ Outcome & Measures of physical and physiological responses & Another nature responses \\ Study design & An observational and descriptive design & - \\ \hline \end{tabular}
\end{table} 
Table 1: Description of the inclusion and exclusion criteria according to the PICOS search strategy. The following data was extracted from the selected studies: (a) author(s) and year of publication; (b) number of participants; (c) sex; (d) age; (e) number of observations; (f) competition; (g) sport class. In addition, the following variables were recorded for locomotor responses: total distance covered and distance covered at different intensity ranges in absolute and relative values, maximum speed reached, accelerations, declarations, changes of direction, player load, and metabolic power. The following variables were used for physiological responses: average heart rate (HRm), maximum heart rate (HRmax), and time spent in different intensity ranges relative to HRmax.