Validity and reliability of fatigue manifestation during basketball game-based drill

The quality of specific endurance preparedness could be verified by decrease of performance due to fatigue manifestation at the end of each quarter. The aim of this study was to determine validity and reliability of fatigue manifestation of basketball players during last three minutes of each quarter during game-based drill. Total of 86 male basketball players participated in this study. Every participant was monitored by the Sage Analytics to find activity demands during a game-based drill. One-way analysis of variance and reliability indexes were calculated. According to validity analysis, significantly growing total distance (F = 11.04; p = .001; r2p = .18) and descending precent of distance decrement (F = 5.46; p = .005; r2p = .11), and fatigue index (F = 14.07; p = .001; r2p = .28) with increased level of performance and at the same time growing total distance and descending precent of distance decrement for backcourt players. The reliability analysis showed that TD (F = 20.60; p = .001; r2p = .17) and precent of distance decrement (F = 5.80; p = .018, r2p = .05) are reliable instrument to express fatigue during game-based drill simulating match workload. The values of ICC were found very high inter-rater reliability for distance decrement (ICC = .818), high for total distance (ICC = .695). Total distance and distance decrement are valid and reliable instruments to express fatigue during game-based drill simulating match workload.