The pre- and post-pitch-entry physical and technical responses of rugby league interchange players according to starting status

This study quantified the activities of interchange players during 15 min before and 20 after initial pitch-entry (INT entry ) or re-entry re−entry for substitutes starters, respectively, identified relationships between pre- post-pitch-entry responses. Fourteen semi-professional rugby league wore Microelectromechanical Systems were filmed throughout 10 matches in which they interchanged (68 observations). Twelve physical technical variables analyzed pre-match warm-up, five, 10, INT (physical only), five epochs following match-introduction. Linear mixed models indicated that 0–5 , responses typically greater (∼7.1% to 66.3%) than subsequent while total (∼6.2%) high-speed (37.1%) distance also exceeded (p < 0.05). Edge forwards reached higher peak speeds (11.4% 11.7%) hookers middle forwards, but completed more passes (87.4% 90.5%). Pre-pitch-entry movements positively associated with tackles (r = 0.43 0.49) 0.46), negatively −0.32 −0.68). Within tolerable limits, increasing activity performed ∼15 could benefit match-play performance indicators. Transient changes reflect self-pacing strategies, contextual factors, perceived preparedness. The apparent absence progressive performance-limiting fatigue, characterized by a plateau re−entry, may suggest role provide sustained impact thus achieve objectives.