Effect of caffeine ingestion on 200 meter running performance

摘要

Theaimofthisstudywastoinvestigatetheinfluenceofcaffeineingestionon200metersperformance(200m).Seventeenphysicaleducationstudents(21.5#177;2.15years;175.9#177;5.5cm;74.1#177;10.04kg)performedontwodifferentdaystwoperformancesof200m.Onehourbeforetheperformancetheparticipantsingestedagelatincapsulecontainingeithercaffeine(6mg.kgsup-1/sup)orplaceboinarandomizeddouble-blindedmanner.Wereanalyzedtheendtimeofthe200mraceandbloodlactate(#91;La#93;;rest,pre-warm-upandpost-test)Caffeineintakedecreasedthetimetoovercome200mracecomparedtoplacebointake(27.398#177;1.626and27.596#177;1.714s,respectively)andincreasedbloodlactateconcentration#91;La#93;pre-warm-up(1.236#177;0.497;1.064#177;0.330mM,respectively)withoutmodificationin#91;La#93;peak.Thus,weconcludethatcaffeineintakeexertanergogeniceffectonanaerobicperformance,howeveranalyzingthe#91;La#93;peak,thisimprovementdoesnotseemtoberelatedtoincreasedglycolyticflux./font