Training and match demands differ between the regular season and finals in semi-professional basketball.

Basketball competitions often include a scheduled regular season followed by knock-out finals. Understanding training and match demands through the season can help optimize performance and reduce injury risk. This study investigated whether training and/or match demands differed between the regular season and finals, and whether these differences were dependent on player role. Average session intensity and volume and durations of relative exercise intensities (inactive, light, moderate-vigorous, maximal, supramaximal) were quantified during training sessions and matches using accelerometry in two semi-professional basketball teams ( = 23; 10 women, 13 men). Training and match demands were compared between the regular season (training: 445 observations; matches: 387 observations) and finals (training: 113 observations, matches: 75 observations) with consideration of player role (starters, in-rotation bench, out-rotation bench). During finals matches, starters received 4.4 min more playing time ( = 0.03), performed 14% more absolute maximal activity ( < 0.01) and had 8% less relative inactive time ( = 0.02) when compared to the regular season. Out-rotation bench players received 2.1 min less playing time ( < 0.01), performed 33% less absolute maximal activity ( = 0.01) and 57% less absolute supramaximal activity ( < 0.01) in finals when compared to the regular season. During finals training sessions, average training intensity was 5% higher ( = 0.02), absolute moderate-vigorous activity was 3% higher ( = 0.04), relative maximal activity was 12% higher ( < 0.01), and relative inactive time was 5% lower ( = 0.03) when compared to the regular season. These findings suggest starters need to be physically prepared for greater match demands during finals, while out-rotation bench players should supplement their training during finals with extra supramaximal activity to maintain their conditioning levels for matches.