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Muscle Metabolism a...
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Vigh-Larsen, J. F.
(författare)
Muscle Metabolism and Fatigue during Simulated Ice Hockey Match-Play in Elite Players
- Artikel/kapitelEngelska2020
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Ovid Technologies (Wolters Kluwer Health),2020
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LIBRIS-ID:oai:gup.ub.gu.se/297815
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https://gup.ub.gu.se/publication/297815URI
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https://doi.org/10.1249/mss.0000000000002370DOI
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Purpose: The present study investigated muscle metabolism and fatigue during simulated elite male ice hockey match-play. Methods: Thirty U20 male national team players completed an experimental game comprising three periods of 8 x 1-min shifts separated by 2-min recovery intervals. Two vastus lateralis biopsies were obtained either during the game (n= 7) or pregame and postgame (n= 6). Venous blood samples were drawn pregame and at the end of the first and last periods (n= 14). Activity pattern and physiological responses were continuously monitored using local positioning system and heart rate recordings. Further, repeated-sprint ability was tested pregame and after each period. Results Total distance covered was 5980 +/- 199 m with almost half the distance covered at high skating speeds (>17 km.h(-1)). Average and peak on-ice heart rate was 84% +/- 2% and 97% +/- 2% of maximum heart rate, respectively. Muscle lactate increased (P <= 0.05) more than fivefold and threefold, whereas muscle pH decreased (P <= 0.05) from 7.31 +/- 0.04 pregame to 6.99 +/- 0.07 and 7.13 +/- 0.11 during the first and last periods, respectively. Muscle glycogen decreased by 53% postgame (P <= 0.05) with similar to 65% of fast- and slow-twitch fibers depleted of glycogen. Blood lactate increased sixfold (P <= 0.05), whereas plasma free fatty acid levels increased 1.5-fold and threefold (P <= 0.05) after the first and last periods. Repeated-sprint ability was impaired (similar to 3%;P <= 0.05) postgame concomitant with a similar to 10% decrease in the number of accelerations and decelerations during the second and last periods (P <= 0.05). Conclusions Our findings demonstrate that a simulated ice hockey match-play scenario encompasses a high on-ice heart rate response and glycolytic loading resulting in a marked degradation of muscle glycogen, particularly in specific sub-groups of fibers. This may be of importance both for fatigue in the final stages of a game and for subsequent recovery.
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Ermidis, G.
(författare)
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Rago, V.
(författare)
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Randers, M. B.
(författare)
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Fransson, Dan,1980Gothenburg University,Göteborgs universitet,Centrum för hälsa och prestationsutveckling,Institutionen för kost- och idrottsvetenskap,Center for Health and Performance,Department of Food and Nutrition, and Sport Science(Swepub:gu)xfrada
(författare)
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Nielsen, J. L.
(författare)
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Gliemann, L.
(författare)
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Piil, J. F.
(författare)
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Morris, N. B.
(författare)
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De Paoli, F. V.
(författare)
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Overgaard, K.
(författare)
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Andersen, T. B.
(författare)
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Nybo, L.
(författare)
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Krustrup, P.
(författare)
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Mohr, M.
(författare)
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Göteborgs universitetCentrum för hälsa och prestationsutveckling
(creator_code:org_t)
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Ingår i:Medicine and science in sports and exercise: Ovid Technologies (Wolters Kluwer Health)52:10, s. 2162-21710195-91311530-0315
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Vigh-Larsen, J. ...
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Ermidis, G.
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Rago, V.
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Randers, M. B.
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Fransson, Dan, 1 ...
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Nielsen, J. L.
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visa fler...
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Gliemann, L.
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Piil, J. F.
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Morris, N. B.
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De Paoli, F. V.
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Overgaard, K.
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Andersen, T. B.
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Nybo, L.
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Krustrup, P.
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Mohr, M.
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