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- W2954298966 abstract "Competitive ice hockey is a high-intensity intermittent sport with an activity pattern characterized by short fast-paced bouts of skating repeated continuously over the course of the game interspersed by passive recovery intervals. However, no previous studies have yet examined the physiological response and degree of fatigue during an elite game. PURPOSE: To examine muscle, blood and performance responses to match-play in elite male ice hockey players in relation to physiologically mediated fatigue. METHODS: Thirty players from the Danish U20 national team participated and completed one experimental game. The game was modified so each period consisted of 8 shifts of 1 minute duration pr. player separated by 2 minutes of recovery resulting in a total playing time of 24 min for each participant. During the game each player was monitored continuously using heart rate monitors and a local positioning system assessing the activity pattern. Muscle biopsies were taken before and after the game (n=7) as well as instantly following shifts during the game (n=6). Blood sampling was performed before the game and at the end of each period. In addition, players performed a repeated sprint test consisting of three maximal 30 m sprints interspersed by 25 s recovery before the game and following each period. RESULTS: Players covered on average 6015±199 m reaching peak speeds of 29±2 km/h including 109±14 intense accelerating or decelerating actions and 2701±251 m high-intensity- and sprint skating resulting in an average and peak heart rate of 143±9 and 182±8 beats pr. min, respectively. Muscle lactate rose from 6.9±3 before the game to 38±20 and 20±12 mmol/kg d.w during the first and third period, while blood lactate increased from 0.8±0.3 at baseline to 4.7±3 and 4.9±3 mM following the first and third period (p≤0.05). Muscle glycogen decreased from 400±22 to 188±43 mmol/kg d. w. over the course of the game (p≤0.05). Compared to pre-game values mean sprint time declined following the first (p≤0.05) and third (p≤0.01), but not after the second period. CONCLUSIONS: Ice hockey is a high-intense team sport with a large anaerobic contribution resulting in significant glycogen utilization and fatigue development especially at the end of the game. The latter finding may at least partly be explained by lowered muscle glycogen levels." @default.
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- W2954298966 date "2019-06-01" @default.
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- W2954298966 title "Muscle, Blood and Performance Responses to Ice Hockey Match-play in Elite Male Players" @default.
- W2954298966 doi "https://doi.org/10.1249/01.mss.0000563474.66038.6a" @default.
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