TABLE 1.

Description of the inclusion and exclusion criteria according to the PICOS and PICo strategies (Stern et al., 2014; Amir-Behghadami and Janati, 2020).

Part - A	Inclusion	Exclusion	Part—B	Inclusion	Exclusion
Population	Healthy, adult participants (≥18 years)	Diseases-state participants	Population	Healthy, adult participants (≥18 years)	Diseases-state participants
Intervention	Regular CrossFit ® training in accordance with the official ‘CrossFit® Level 1 Training Guide’; experimental data	Non-CrossFit®-specific workouts; only HIFT/HIMT or stand-alone WOD interventions; questionnaire data	Interest	COVID-19-pandemic-induced changes of the training behavior of CrossFit ® athletes	Non-CrossFit®-specific relation
Comparator	Controlled by baseline or pre-intervention measures	Specific medical or nutrition intervention	Context	Closure of training facilities, lockdown, and social distancing during the COVID-19 pandemic	Non-COVID-19-specific relation
Outcomes	Short-term physiological parameters	Long-term physiological parameters (>48 h)
Study design	Cross-sectional, randomized, and non-randomized	Case reports, reviews, and meta-analysis

Abbreviations: PICOS, Population, Intervention, Comparator, Outcomes, Study Design; PICo, Population, Interest, Context.