Caffeine, fatigue, and cognition

Lorist, Monicque M.; Tops, Mattie

doi:10.1016/s0278-2626(03)00206-9

Cited by 251 publications

(183 citation statements)

References 81 publications

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“…Multiple mechanisms might be responsible for reduce RPE in exercise. Caffeine increases the activation of the sympathetic central nervous system through adenosine receptor antagonism (Davis, Green, 2009) thus, caffeine is in blocking the inhibitory properties of endogenous adenosine (particularly at A 1 and A 2A receptors), resulting in increased behaviors related to dopamine, norepinephrine and glutamate release (Brunyé et al, 2010;Lorist, Tops, 2003). Adenosine inhibits the release of most excitatory neurotransmitters in the brain, particularly dopamine, and might reduce dopamine synthesis (Woolf, Bidwell, Carlson, 2008).…”

Section: Discussionmentioning

confidence: 99%

The effects of different doses of caffeine on performance, rating of perceived exertion and pain perception in teenagers female karate athletes

Arazi

Hoseinihaji

Eghbali

2016

Braz. J. Pharm. Sci.

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The present study set to examine the effects of different doses of caffeine on performance, rating of perceived exertion (RPE), and pain perception in female teenager athletes of karate. Ten female karate athletes (16.8±1.23 years; height 1.59±0.28 m; body-mass 57.73±8.33 kg; BMI 22.71±3.05 kg/m 2 ) participated in the study. A double-blind, randomized, and crossover counterbalanced design was used. In three sessions (with an interval of seven days'), ten female karate athletes ingested low dose (2 mg/ kg), moderate dose (5 mg/kg) caffeine, and placebo. Sixty minutes after consumption, they performed the tests as below: one repetition maximum and 60% of one repetition maximum in the leg press, explosive power test, and anaerobic RAST test. After the tests, the participants' RPE (6-20 scale) and pain perception (0-10 scale) were recorded using various categorical scales. The results showed that caffeine ingestion at moderate dose significantly reduced RPE and pain perception values compared with the placebo during muscular endurance test (P=0.0001 and P=0.039, respectively). The findings suggest that caffeine dose of 5 mg/kg body mass appears to improve RPE and pain perception in female teenager athletes of karate. The dose of 2 mg/kg body mass does not confer any additional improvement in performance.Uniterms: Caffeine/effects. Karate athletes/performance. Caffeine/rating of perceived exertion. Caffeine/ performance. Caffeine/pain perception. INTRODUCTIONCaffeine (1,3,7-trimethylxanthine) is a plant alkaloid that occurs naturally in the diet (Sökmen et al., 2008) and nearly 90% of US adults consume caffeine in forms of coffee, tea, or other caffeinated food products (8 cup of coffee may contain 50-200 mg caffeine) (Owens, 2015;Yang, Palmer, De Wit, 2010). In the U.S.A., adults ingest an average of 3 mg/kg of caffeine daily in coffee, tea, caffeinated sodas, and many other drinks and food (Sökmen et al., 2008). The popularity of caffeine as an ergogenic aide has increased dramatically over the last decade (Hendrix et al., 2010), Caffeine is the most widely consumed to improve cognitive, physical performance during exercise and has become a popular ergogenic aid among recreational and competitive athletes (Hendrix et al., 2010;Sökmen et al., 2008;Zheng et al., 2014).Caffeine is classified as part of the methylxanthine family of drugs (Cechella et al., 2014;Mohr, Nielsen, Bangsbo, 2011) and is extensively consumed by athletes as an ergogenic aid (Backhouse et al., 2011;Mohr, Nielsen, Bangsbo, 2011) since its removal from the World AntiDoping Agency (WADA) prohibited list of substances (Backhouse et al., 2011;Mohr, Nielsen, Bangsbo, 2011). According to the Medical Council of International Olympic Committee (IOC), caffeine is allowed in sports as long as its urinary excretion level is below 12 µg/mL (Bell, Jacobs, Ellerington, 2001).Taken orally, caffeine reaches a peak plasma concentration of 30-90 min after ingestion, and a halflife has been reported to be 3 to 5 hours with a modest intake of coffee (Sökmen et al.,...

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Section: Discussionmentioning

confidence: 99%

The effects of different doses of caffeine on performance, rating of perceived exertion and pain perception in teenagers female karate athletes

Arazi

Hoseinihaji

Eghbali

2016

Braz. J. Pharm. Sci.

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“…A number of studies have examined the benefits of daytime caffeine consumption in nonexperimentally sleep-deprived individuals (Loke et al 1985;Lieberman et al 1987;Zwyghuizen-Doorenbos et al 1990;Nehlig et al 1992;Dimpfel et al 1993;Spriet 1995;Lorist et al 1996;Kaplan et al 1997;Brice et al 2002;Lorist et al 2003;Cysneiros et al 2007). The performance tasks used in these studies measure reaction time and motor speed, speed of information processing, vigilance and attention, immediate and delayed verbal memory, as well as mood and alertness (for review see (Nehlig et al 1992;Lorist et al 2003).…”

Section: Introductionmentioning

confidence: 99%

“…The performance tasks used in these studies measure reaction time and motor speed, speed of information processing, vigilance and attention, immediate and delayed verbal memory, as well as mood and alertness (for review see (Nehlig et al 1992;Lorist et al 2003). Generally, caffeine enhances mood and alertness (Lieberman et al 1987;Kaplan et al 1997), vigilance and attention (Lieberman et al 1987;Zwyghuizen-Doorenbos et al 1990), speed of information processing (Kaplan et al 1997;Cysneiros et al 2007), reaction time and motor speed (Lieberman et al 1987;Zwyghuizen-Doorenbos et al 1990; Kaplan et al 1997;Cysneiros et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Comparing the benefits of caffeine, naps and placebo on verbal, motor and perceptual memory

Mednick

Cai

Kanady

et al. 2008

Behavioural Brain Research

104

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Caffeine, the world's most common psychoactive substance, is used by approximately 90% of North Americans everyday. Little is known, however, about its benefits for memory. Napping has been shown to increase alertness and promote learning on some memory tasks. We directly compared caffeine (200mg) with napping (60-90 minutes) and placebo on three distinct memory processes: declarative verbal memory, procedural motor skills, and perceptual learning. In the verbal task, recall and recognition for unassociated words were tested after a 7hr retention period (with a betweensession nap or drug intervention). A second, different, word list was administered post-intervention and memory was tested after a 20min retention period. The non-declarative tasks (finger tapping task and texture discrimination task) were trained before the intervention and then retested afterwards. Naps enhanced recall of words after a 7hr and 20min retention interval relative to both caffeine and placebo. Caffeine significantly impaired motor learning compared to placebo and naps. Napping produced robust perceptual learning compared with placebo; however, naps and caffeine were not significantly different. These findings provide evidence of the limited benefits of caffeine for memory improvement compared with napping. We hypothesize that impairment from caffeine may be restricted to tasks that contain explicit information; whereas strictly implicit learning is less compromised.

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“…It was used as a cardiotonic until the end of the 19th century, due to its stimulatory effects (Wijhi, 2002). Prolonged caffeine consumption has a deleterious effect on cardiac patients and can also lead to osteoporosis, malfunction of the foetus, cardiac arrhythmias, irregular muscular activity, adrenal stimulation, apathy, headache, and fatigue (Lorist and Tops, 2003;Smith, 2002). Apart from such negative aspects, decaffeination is essential from an environmental point of view.…”

Section: Introductionmentioning

confidence: 99%

Enhanced caffeine degradation by immobilised cells of <i>Leifsonia</i> sp. strain SIU

Ibrahim

Shukor

Syed

et al. 2016

J. Gen. Appl. Microbiol.

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Caffeine, fatigue, and cognition

Cited by 251 publications

References 81 publications

The effects of different doses of caffeine on performance, rating of perceived exertion and pain perception in teenagers female karate athletes

The effects of different doses of caffeine on performance, rating of perceived exertion and pain perception in teenagers female karate athletes

Comparing the benefits of caffeine, naps and placebo on verbal, motor and perceptual memory

Enhanced caffeine degradation by immobilised cells of <i>Leifsonia</i> sp. strain SIU

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