Effects of caffeine ingestion on the diurnal variation of cognitive and repeated high-intensity performances

Souissi, Youssef; Souissi, Makram; Chtourou, Hamdi

doi:10.1016/j.pbb.2019.01.001

Cited by 32 publications

(31 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These results are similar to Hogervorst et al [ 47 ] and support that low-dose caffeine may have a direct and specific effect on perceptual-motor speed, efficiency factor, or executive information processing [ 48 ]. Moreover, the present finding of 6 mg/kg caffeine decreasing Stroop task RTs in the incongruent condition is consistent with Souissi et al [ 49 ], whose findings showed that 6 mg/kg of caffeine improved RTs. These results suggest that the ingestion of a low or moderate dose of caffeine may reduce interference and thus improve exertive function during exercise.…”

Section: Discussionsupporting

confidence: 93%

Effects of Various Doses of Caffeine Ingestion on Intermittent Exercise Performance and Cognition

et al. 2020

View full text Add to dashboard Cite

To date, no study has examined the effects of caffeine on prolonged intermittent exercise performance that imitates certain team-sports, and the suitable concentration of caffeine for improved intermittent exercise performance remains elusive. The purpose of the present cross-over, double-blind preliminary study was to investigate effects of low, moderate, and high doses of caffeine ingestion on intermittent exercise performance and cognition. Ten males performed a familiarization session and four experimental trials. Participants ingested capsules of placebo or caffeine (3, 6, or 9 mg/kg) at 1 h before exercise, rested quietly, and then performed cycling for 2 × 30 min. The cycling protocol consisted of maximal power pedaling for 5 s (mass × 0.075 kp) every minute, separated by unloaded pedaling for 25 s and rest for 30 s. At pre-ingestion of capsules, 1 h post-ingestion, and post-exercise, participants completed the Stroop task. The mean power-output (MPO), peak power-output (PPO), and response time (RT) in the Stroop task were measured. Only 3 mg/kg of caffeine had positive effects on the mean PPO and MPO; 3 mg/kg caffeine decreased RTs significantly in the incongruent and congruent conditions. These results indicate that the ingestion of low-dose caffeine had greater positive effects on the participants’ physical strength during prolonged intermittent exercise and cognition than moderate- or high-dose caffeine.

show abstract

Section: Discussionsupporting

confidence: 93%

Effects of Various Doses of Caffeine Ingestion on Intermittent Exercise Performance and Cognition

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Nonetheless, the beneficial effects of 6 mg/kg of caffeine on cognitive performance are in dispute. Similar to the present study, Souissi et al (2019) found that 6 mg/kg of caffeine ingestion improved RT and attention. Moreover, Ali et al (2015) showed that 6 mg/kg of caffeine induced a tendency toward improvement in performance on the Stroop task among female athletes engaged in team sports.…”

Section: Discussionsupporting

confidence: 92%

“…These results demonstrate that under high cognitive processing, the effects of caffeine on LPFC activation have been attenuated by higher demanding processing, whereas under low cognitive tasks, the effects of caffeine on LPFC activation are more pronounced, because the congruent condition in Stroop task involved less demanding processing. The present results provide new evidences for previous studies that caffeine improvement of brain activation is induced more easily at the moment of the lowest values ( Niioka and Sasaki, 2003 ; Souissi et al, 2019 ).…”

Section: Discussionsupporting

confidence: 86%

“…Reports in the scientific literature present inconsistent findings in relation to the effects of caffeine ingestion on the Stroop task performance, a measure of executive function. Some studies involving cognitive inhibition or interference conditions report faster or potential fast reaction times (RTs) with the use of caffeine ( Hasenfratz and Bättig, 1992 ; Kenemans et al, 1999 ; Hogervorst et al, 2008 ; Dixit et al, 2012 ; Dodd et al, 2015 ; Souissi et al, 2019 ), whereas others report no change at all ( Edwards et al, 1996 ; Bottoms et al, 2013 ). Differences in outcomes between studies may be related to the sensitivity of the cognitive tests used or the dose of caffeine administered, and more studies need to examine effects of caffeine on cognition.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Cognition and Brain Activation in Response to Various Doses of Caffeine: A Near-Infrared Spectroscopy Study

et al. 2020

View full text Add to dashboard Cite

Caffeine, which is widely used for enhancing athletic performance, has been suggested to have a positive impact on cognition via stimulating the brain. However, no study published to date has explored the effects of different doses of caffeine ingestion on brain activation via cortical hemodynamics. The purpose of the present crossover, double-blind study was to investigate the effects of low, moderate, and high doses of caffeine ingestion on cognitive performance and brain activation. Ten healthy male subjects ingested placebo or caffeine (3, 6, or 9 mg/kg body mass). The effects of each treatment condition were evaluated by Stroop tasks before and 60 min after the ingestion of caffeine. Reaction time (RT) and accuracy of responses to congruent and incongruent stimuli were assessed. As an index of brain activation with cognition, levels of oxygenated hemoglobin (HbO) were measured via near-infrared spectroscopy. A 4 × 2 mixed ANOVA revealed that there were significant interaction effects for RT in both incongruent and congruent conditions ( P < 0.01, P η 2 = 0.384; P < 0.05, P η 2 = 0.259; and P < 0.05, P η 2 = 0.309). Both 3 and 6 mg/kg of caffeine ingestion significantly decreased RT to incongruent stimuli. The only dose of caffeine to decrease RT in response to congruent stimuli was 3 mg/kg. None of the doses of caffeine administered affected accuracy of responses to incongruent or congruent stimuli. Under the congruent stimulus condition, ingestion of 3 mg/kg of caffeine significantly increased mean HbO in the dorsolateral prefrontal cortex, frontal pole area, ventrolateral prefrontal cortex ( P < 0.01, P η 2 = 0.319; P < 0.05, P η 2 = 0.263; and P < 0.05, P η 2 = 0.259, respectively). None of the doses of caffeine investigated affected HbO under the incongruent stimulus condition. Ingestion of low-dose caffeine has greater effects on cognition and brain activation than moderate and high doses of caffeine, suggesting that low-dose caffeine may be a selective supplement in enhancing executive function and prefrontal activities.

show abstract

“…In part, caffeine's most significant benefits in the morning may be related to the substance that mitigates performance drops in anaerobic exercises. This is evidenced by an impaired performance during the morning tests in placebo conditions (Chtourou and Souissi, 2012;Fernandes et al, 2014), inducing similar status performances when the caffeine intake occurs in the morning compared to its ingestion in the late afternoon or early evening (Chtourou and Souissi, 2012;Souissi et al, 2013;Fernandes et al, 2014;Mora-Rodríguez et al, 2015).These effects have been documented in the 3 km time trial test (Mora-Rodríguez et al, 2015;Boyett et al, 2016), in strength (Mora-Rodríguez et al, 2012) and in high-intensity short-duration exercises (Souissi et al, 2013(Souissi et al, , 2019, and less clear gains have occurred during sprints and aerobic exercises (Chtourou and Souissi, 2012;Lopes-Silva et al, 2018).…”

Section: Time Of Day Training Vs Caffeine Consumptionmentioning

confidence: 96%

Caffeine and Exercise Performance: Possible Directions for Definitive Findings

Martins

Guilherme

Ferreira

et al. 2020

Front. Sports Act. Living

View full text Add to dashboard Cite

Caffeine is one of the most studied supplements in the world. Studies correlate its use to increased exercise performance in endurance activities, as well as its possible ergogenic effects for both intermittent and strength activities. Recent findings show that caffeine may increase or decrease exercise performance. These antagonist responses may occur even when using the same dosage and for individuals with the same characteristics, making it challenging to explain caffeine's impact and applicability. This review article provides an analytic look at studies involving the use of caffeine for human physical performance, and addresses factors that could influence the ergogenic effects of caffeine on different proposed activities. These factors subdivide into caffeine effects, daily habits, physiological factors, and genetic factors. Each variable has been focused on by discussions to research related to caffeine. A better understanding and control of these variables should be considered in future research into personalized nutritional strategies.

show abstract

Effects of caffeine ingestion on the diurnal variation of cognitive and repeated high-intensity performances

Cited by 32 publications

References 52 publications

Effects of Various Doses of Caffeine Ingestion on Intermittent Exercise Performance and Cognition

Effects of Various Doses of Caffeine Ingestion on Intermittent Exercise Performance and Cognition

Cognition and Brain Activation in Response to Various Doses of Caffeine: A Near-Infrared Spectroscopy Study

Caffeine and Exercise Performance: Possible Directions for Definitive Findings

Contact Info

Product

Resources

About