Muscle metabolism and impaired sprint performance in an elite women's football game

Peter Krustrup*, Magni Mohr, Lars Nybo, Dimitrios Draganidis, Morten Bredsgaard Randers, Georgios Ermidis, Christina Ørntoft, Line Røddik, Dimitrios Batsilas, Athanasios Poulios, Niels Ørtenblad, Georgios Loules, Charikleia K Deli, Alexios Batrakoulis, Jakob L Nielsen, Athanasios Z Jamurtas, Ioannis G Fatouros

*Corresponding author af dette arbejde

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

28 Citationer (Scopus)
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Abstract

The present study examined skeletal muscle metabolism and changes in repeated sprint performance during match play for n = 20 competitive elite women outfield players. We obtained musculus vastus lateralis biopsies and blood samples before, after, and following intense periods in each half of a friendly match, along with 5 × 30-meter sprint tests and movement pattern analyses (10-Hz S5 Global Positioning System [GPS]). Muscle glycogen decreased by 39% and 42% after an intense period of the second half and after the match, respectively, compared to baseline (p < 0.05). Post-match, 80% type I fibers and 69% type II fibers were almost empty or completely empty of glycogen. Muscle lactate was higher (p < 0.05) after the intense period of the first half and post-match compared to baseline (14.3 ± 4.6 (±SEM) and 12.9 ± 5.7 vs. 6.4 ± 3.7 mmol/kg d.w.). Muscle phosphocreatine was reduced (p < 0.05) by 16% and 12%, respectively, after an intense period in the first and second half compared to baseline. Blood lactate and glucose increased during the match and peaked at 8.4 ± 2.0 and 7.9 ± 1.2 mmol/L, respectively. Mean 5 × 30 m sprint time declined by 3.2 ± 1.7 and 7.0 ± 2.1% after the first and second half, respectively, and 4.7 ± 1.6% (p < 0.05) after an intense period in the first half compared to baseline. In conclusion, match play in elite female football players resulted in marked glycogen depletion in both fiber types, which may explain fatigue at the end of a match. Repeated sprint ability was impaired after intense periods in the first half and after both halves, which may be associated with the observed muscle metabolite perturbations.

OriginalsprogEngelsk
TidsskriftScandinavian Journal of Medicine & Science in Sports
Vol/bind32
Udgave nummerS1
Sider (fra-til)27-38
Antal sider12
ISSN0905-7188
DOI
StatusUdgivet - 2022

Bibliografisk note

CURIS 2022 NEXS 105

© 2021 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

Emneord

  • Det Natur- og Biovidenskabelige Fakultet

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