Table 1. Inclusion and exclusion criteria.
Inclusion criteria Exclusion criteria
Population Team-sport athletes of any gender and level (invasion sports on the field or court). Non-team sports (e.g., solo, squash, or combat sports), ice, beach, or water team sports, game officials, non-athletes.
Intervention The combined training intervention is defined as athletes performing neuromuscular training (such as plyometrics and resistance training) combined with metabolic training (such as sprinting, interval training) on the same training day or within the same training session. These interventions lasted for at least 4 weeks. The intervention group did not involve studies that utilized combinations of training methods such as plyometrics, resistance training, sprinting, or repeated sprint training. Acute interventions lasting < 4 weeks.
Comparator Active control (CON) (i.e., players participating keeps regular training) or a specific control group with single-mode training (SGL) (i.e., players participating resistance, plyometrics, sprint, repeated sprints, etc.). No control groups.
Outcome The study includes pre- and post-intervention assessment of at least one RSA parameter: RSA best, RSA mean, and RSA fatigue index (i.e., assessed by fatigue index and/or sprint attenuation scores). The pre- and post-testing modalities must be a running RSA test performed on the ground. The pre-test or post-test lacks the outcomes of the RSA test and is an RSA test in a laboratory environment, such as cycling.
Study design The study design must have at least two groups and be a randomized controlled trial. Non-randomized controlled trials, single-arm experiments, and observational studies.