Table 2.

Selection criteria.

Category	Inclusion criteria	Exclusion criteria
Population	Elite female and male athletes who are international or national top-level athletes (succeeded in national competitions) or athletes in highly competitive leagues (e.g., NCAA Division 1)	Athletes competing at regional, state, or provincial levels, masters level competitors (> 35 years), the sample size includes both elite and non-elite (e.g., novice or recreational) athletes, athletes from countries with low sports competitiveness, disabled athletes
Intervention	Training programs lasting a minimum of 4 weeks or comprising at least 10 sessions; resistance training interventions including free weights, machine weights, isokinetic devices, elastic bands, resisted running, and plyometrics	Resistance training combined with supplementary aids (e.g., nutritional, pharmacological, physiological, or psychological)
Comparator	Control group consisting of elite athletes	Absence of a control or an active control group, athletes from sports different from the intervention group
Outcome	At least one measure of sport-specific performance	Lack of pre- and post-intervention measures, outcomes differing significantly from at least top national level
Study design	Between-subjects design	Systematic reviews, observational studies, case studies