TABLE 1.

Inclusion and exclusion criteria

Item	Inclusion Criteria	Exclusion Criteria
Population	Soccer players from any age or sex, without injury, illness or other clinical condition. Futsal (indoor soccer), if any, will be included.	Soccer players in rehabilitation or in return-to-play programmes. Other sports than soccer/futsal (e.g., volleyball, basketball, rugby, Australian or American football).
Intervention	PJT-based programmes (bilateral and/or unilateral) restricted to a minimum of 3 weeks (duration) and no restricted to frequency (number of sessions per week).	Other training methods. PJT combined with other training methods.
Comparator	Passive or active control groups.	Other PJT training group (i.e., PJT vs. PJT without control group were excluded). Cases as two PJT and a control were included.
Outcome	Pre-post intervention values of static and/or dynamic balance.	Outcomes not related to dynamic and/or static balance; no information (e.g., mean; standard deviation) reported for pre- and/or post-intervention (e.g., follow-up excluded)
Study Design	Randomized controlled and/or parallel trials.	Non-randomized and non-controlled studies
Additional criteria	Peer reviewed, original, full-text studies written in English, Portuguese and/or Spanish.	Written in other language than English, Portuguese and/or Spanish. Reviews, letters to editors, trial registrations, proposals for protocols, editorials, book chapters, conference abstracts.