Caffeine Gum Improves Reaction Time but Reduces Composure Versus Placebo During the Extra-Time Period of Simulated Soccer Match-Play in Male Semiprofessional Players.
Int J Sport Nutr Exerc Metab
; 34(5): 286-297, 2024 Sep 01.
Article
in En
| MEDLINE
| ID: mdl-38917989
ABSTRACT
This study aimed to determine whether caffeine gum influenced perceptual-cognitive and physical performance during the extra-time period of simulated soccer match-play. Semiprofessional male soccer players (n = 12, age 22 ± 3 years, stature 1.78 ± 0.06 m, mass 75 ± 9 kg) performed 120-min soccer-specific exercise on two occasions. In a triple-blind, randomized, crossover design, players chewed caffeinated (200 mg; caffeine) or control (0 mg; placebo) gum for 5 min following 90 min of soccer-specific exercise. Perceptual-cognitive skills (i.e., passing accuracy, reaction time, composure, and adaptability) were assessed using a soccer-specific virtual reality simulator, collected pre- and posttrial. Neuromuscular performance (reactive-strength index, vertical jump height, absolute and relative peak power output, and negative vertical displacement) and sprint performance (15 and 30 m) were measured at pretrial, half-time, 90 min, and posttrial. Caffeine gum attenuated declines in reaction time (pre 90.8 ± 0.8 AU to post 90.7 ± 0.8 AU) by a further 4.2% than placebo (pre 92.1 ± 0.8 AU to post 88.2 ± 0.8 AU; p < .01). Caffeine gum reduced composure by 4.7% (pre 69.1 ± 0.8 AU to post 65.9 ± 0.8 AU) versus placebo (pre 68.8 ± 0.8 AU to post 68.3 ± 0.8 AU; p < .01). Caffeine gum did not influence any other variables (p > .05). Where caffeine gum is consumed by players prior to extra-time, reaction time increases but composure may be compromised, and neuromuscular and sprint performance remain unchanged. Future work should assess caffeine gum mixes with substances like L-theanine that promote a relaxed state under stressful conditions.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Reaction Time
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Soccer
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Caffeine
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Cross-Over Studies
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Athletic Performance
Limits:
Adult
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Humans
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Male
Language:
En
Journal:
Int J Sport Nutr Exerc Metab
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Int. j. sport nutr. exerc. metab
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International journal of sport nutrition and exercise metabolism
Journal subject:
CIENCIAS DA NUTRICAO
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MEDICINA ESPORTIVA
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METABOLISMO
Year:
2024
Document type:
Article
Affiliation country:
Country of publication: