Reactive diving and sprinting performances in soccer goalkeepers improved by caffeine consumption and post-activation performance enhancement

Impey, Justin; Bahdur, Khatija; Kramer, Mark R.

doi:10.1007/s12662-021-00746-2

Cited by 2 publications

(3 citation statements)

References 43 publications

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“…Accordingly, the significant difference in reaction time may have concluded from motivators through hormonal changes. In two similar studies, Impey et al ( 53 , 54 ) reported that caffeine consumed 60 min prior to a performance in soccer goalkeepers positively affected reaction time. Similarly, it was shown that both 3 and 6 mg/kg of acute caffeine intake enhanced reaction time in female team sport athletes ( 55 ).…”

Section: Discussionmentioning

confidence: 96%

Moderate-dose caffeine enhances anaerobic performance without altering hydration status

Mor,

Acar,

Alexe

et al. 2024

Front. Nutr.

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The effects of direct nutritional supplements on athletic performance are still being investigated and arouse curiosity. Only one study in the literature was found that investigated the kicking speed performance of futsal players following low-dose caffeine supplementation (3 mg/kg); thus, the question of whether caffeine supplementation improves kicking speed as well as essential physical parameters in soccer players is still controversial. Therefore, the aim of this study was to determine the effect of caffeine supplementation on vertical jump (VJ), sprint, reaction time, balance, change of direction (COD), and ball-kicking speed in soccer players. In a double-blind, cross-over design, nine moderately trained male soccer players (21.11 ± 2.02 years, 171.22 ± 6.14 cm, 71.78 ± 10.02 kg) consumed caffeine (6 mg/kg) or a placebo 60 min before completing balance, reaction time, vertical jump, agility, 30 m sprint, and ball-kicking speed tests. Greater VJ height (p = 0.01) and power (p = 0.08), and faster completion time according to the Illinois Agility Test (p = 0.08) were found following caffeine supplementation compared to placebo. Elapsed time (p = 0.01), average (p = 0.01) time, and the slowest reaction times (p = 0.016) were significantly reduced after caffeine consumption compared to placebo supplementation. Caffeine intake significantly improved VJ, agility, and reaction time (p < 0.05) but did not affect 30 m sprint, ball-kicking speed, balance, and RPE values in soccer players (p > 0.05). Although non-significant, caffeine intake also improved sprint (0.67%) and ball kicking (2.7%) performance percentages. Also, caffeine consumption did not induce dehydration, and the athletes’ body hydration levels were normal. These findings support the use of caffeine supplementation as an effective nutritional ergogenic aid to enhance anaerobic performance, at least for vertical jumps, COD speed, and reaction time, in trained male soccer players.

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Section: Discussionmentioning

confidence: 96%

Moderate-dose caffeine enhances anaerobic performance without altering hydration status

Mor,

Acar,

Alexe

et al. 2024

Front. Nutr.

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“…In our study, CAF intake appears to have no effect on ART values. Other studies, however, have revealed contradictory results [41,[64][65][66][67]. Impey et al [64,65] reported that CAF ingestion 60 min before exercise improved visual and auditory reaction times.…”

Section: Discussionmentioning

confidence: 99%

“…Other studies, however, have revealed contradictory results [41,[64][65][66][67]. Impey et al [64,65] reported that CAF ingestion 60 min before exercise improved visual and auditory reaction times. Likewise, a study by Virdinli et al [68] suggested that CAF mouth rinse increased RT performance in forty-five trained athletes.…”

Section: Discussionmentioning

confidence: 99%

Caffeine Improves Sprint Time in Simulated Freestyle Swimming Competition but Not the Vertical Jump in Female Swimmers

Acar,

Mor,

Mor

et al. 2024

Nutrients

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Caffeine (CAF) has been shown to be an effective ergogenic aid in enhancing sports performance, including vertical jump (VJ), sprint, balance, agility, and freestyle swimming performance (FSP). However, whether acute CAF supplementation improves FSP in moderately trained female swimmers has not been well documented. Therefore, this study aimed to investigate the effects of CAF intake on vertical jump, balance, auditory reaction time (ART), and swimming performance in female swimmers. In a double-blind, cross-over design, eight moderately trained female swimmers (age: 21.3 ± 1.4 years, height: 161.2 ± 7.1 cm, body mass: 56.3 ± 6.7 kg, body mass index (BMI): 21.9 ± 1.3 kg/m2, and habitual CAF intake: 246.4 ± 111.4 mg/day) ingested caffeine (CAF) (6 mg/kg) or a placebo (PLA) 60 min before completing VJ, balance, ART, and 25/50 m FSP. CAF supplementation resulted in a significantly lower time both in 25m (p = 0.032) and 50m (p = 0.033) FSP. However, CAF resulted in no significant difference in VJ, ART, and RPE (p > 0.05). Balance test results showed a non-significant moderate main effect (d = 0.58). In conclusion, CAF seems to reduce time in short-distance swimming performances, which could be the determinant of success considering the total time of the race. Thus, we recommend coaches and practitioners incorporate CAF into swimmers’ nutrition plans before competitions, which may meet the high performance demands.

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Reactive diving and sprinting performances in soccer goalkeepers improved by caffeine consumption and post-activation performance enhancement

Cited by 2 publications

References 43 publications

Moderate-dose caffeine enhances anaerobic performance without altering hydration status

Moderate-dose caffeine enhances anaerobic performance without altering hydration status

Caffeine Improves Sprint Time in Simulated Freestyle Swimming Competition but Not the Vertical Jump in Female Swimmers

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