Caffeine supplementation does not affect match activities and fatigue resistance during match play in young football players
| Autor: | Morten B. Randers, Jens Bangsbo, Peter Krustrup, Magni Mohr, João Brito, Yun Jin, Svein Arne Pettersen, Mads Bendiksen |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
medicine.medical_specialty
Physical Therapy Sports Therapy and Rehabilitation match analysis Football Affect (psychology) Placebo chemistry.chemical_compound Physical medicine and rehabilitation blood lactate Heart rate medicine Orthopedics and Sports Medicine Yo-Yo IR2 test ergogenic effect intermittent exercise performance Muscle fatigue biology business.industry Athletes VDP::Medisinske Fag: 700::Idrettsmedisinske fag: 850 biology.organism_classification soccer Match analysis chemistry Physical therapy VDP::Medical disciplines: 700::Sports medicine: 850 business Caffeine human activities |
| Zdroj: | Pettersen, S A, Krustrup, P, Bendiksen, M, Randers, M B, Brito, J, Bangsbo, J, Jin, Y & Mohr, M 2014, ' Caffeine supplementation does not affect match activities and fatigue resistance during match play in young football players ', Journal of Sports Sciences, vol. 32, no. 20, pp. 1958-1965 . https://doi.org/10.1080/02640414.2014.965189 |
| ISSN: | 1466-447X 0264-0414 |
| DOI: | 10.1080/02640414.2014.965189 |
| Popis: | This is an Accepted Manuscript of an article published by Taylor & Francis in Journal of Sports Sciences on 30 October 2014, available online: http://www.tandfonline.com/10.1080/02640414.2014.965189. The study examined the effect of caffeine supplementation on match activities and development of fatigue during a football match. In a randomised, double-blind cross-over design, two experimental football games separated by 7 days were organised between the junior teams of two professional football clubs (17.6 ± 1.1 years (±s), 71.7 ± 6.9 kg, 13.9% ± 5.0% body fat). The players ingested either a capsule of 6 mg · kg−1 b.w. caffeine or placebo (dextrose) 65 min prior to the matches. Match activities were assessed using the ZXY match analysis system, and a Yo-Yo intermittent recovery test–level 2 (Yo-Yo IR2) was conducted immediately post-game. Heart rate was monitored throughout the game, and blood samples were obtained at baseline, half-time and after the game. There were no differences between caffeine and placebo regarding total distance covered (10,062 ± 916 vs 9854 ± 901 m), high-intensity running (557 ± 178 vs 642 ± 240 m), sprinting distance (109 ± 58 vs 112 ± 69 m) or acceleration counts (123 ± 31 vs 126 ± 24). In both trials, players displayed lower (P < 0.05) values in total distance and acceleration counts in the last 15 min compared to all other 15-min periods of the matches. Post-game Yo-Yo IR2 performance was not different between game trials (caffeine: 829 ± 322 m; placebo 819 ± 289 m). In conclusion, oral caffeine administration does not appear to have an ergogenic effect in young football players during match play. |
| Databáze: | OpenAIRE |
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