Table 1.

Eligibility criteria.

	Inclusion Criteria	Exclusion Criteria
Population	Soccer players from any age group, competitive level, or sex.	Sports other than soccer (e.g., futsal, beach football, basketball, rugby, Australian football), physical education students, general population.
Exposure	Players monitored for sleep quality and/or quantity.	Not controlled for sleep quality and/or quantity.
Comparator	Not mandatory. If available: comparisons between players with regular sleep (>7 h) and players identified with sleep depreviation and/or sleep loss (insomnia).	Sleep disorders other than sleep deprivation and/or sleep loss (e.g., sleep apnea, restless legs syndrom, narcolepsy).
Outcome	Relationships between objective and/or subjective sleep measures (e.g., number of hours of sleep; quality of sleep) and one of the following measures: (i) athletic performance (e.g., cardiorrespiratory fitness, anaerobic power, strength/power, mobility, speed, agility); (ii) match performance (e.g., cognitive performance, tactical/technical performance; match-running performance); (iii) training load (measures related to psychophysiological or physical load); and/or (iv) injury occurrence.	Other measures not related to athletic and match performance, training load, and injury occurrence (e.g., wellness measures). No effect of the exercise in sleep quality or quantity. Studies that analyzed the effect of exercise in sleep quality or quantity.
Other	Only original studies (not restricted to any language).	Abstracts, proceedings, letters, and other non-original studies.