One Week of Low or Moderate Doses ofCaffeinated Coffee Consumption Does NotInduce Tolerance to The Acute Effects of Caffeine on Sprint Performance
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Raci Karayigi [1] ; DicleAras [1]
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[1] Ankara University
Ankara University
Turquía
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- Localización: European Journal of Human Movement, ISSN-e 2386-4095, ISSN 0214-0071, Nº. 47, 2021, págs. 49-60
- Idioma: inglés
- Enlaces
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Resumen
Habituation to acute performance responses of caffeine intake is still an ongoing debate. The aim of this study was to evaluate the effects of acute and 1 week consumption of caffeinated coffee on intermittent sprint cycling performance (12x4s with 90s active recovery) (ISP). Twenty four male team-sport players randomly divided into 3 groups (8 athletes for each): 0.16 gr/kg decaffeinated coffee ingestion in a day for 1 week (PLAGROUP), 0.08 caffeinated + 0.08 decaffeinated coffee (providing 3 mg/kg caffeine) (0.16 gr/kg in total) (LOWGROUP) and 0.16 gr/kg caffeinated coffee (providing 6 mg/kg caffeine) (MODGROUP). In a randomized and double-blind design, participants underwent three test session: At the first two test sessions, ISP test was performed with acute ingestion of decaffeinated coffee (PLA) or 6 mg/kg of caffeine provided by coffee (FIRSTCAF) to test acute effects of caffeine intake. At the third test session, following to 1 week of coffee consumption, to test if tolerance develops, ISP was performed with ingestion 6 mg/kg of caffeine provided by coffee (SECONDCAF). A 2-way repeated measures ANOVA showed that although average peak (p=0,39; η2 =0,13) and average mean (p=0,11; η2 =0,15) power of total 12 sprints during ISP test were not statistically different between 1 week consumption groups, FIRSTCAF and SECONDCAF significantly increased peak power (p=0,01; η2 =0,44) and mean power (p=0,01; η2 =0,46) in the first three sprints compared to PLA in all consumption groups. It appears that no tolerance was developed in 1 week consumption of 3 or 6 mg/kg/day of caffeine provided by coffee.
