Effects of Morning Caffeine’ Ingestion on Mood States, Simple Reaction Time, and Short-Term Maximal Performance on Elite Judoists

Souissi, Makram; Abedelmalek, Salma; Chtourou, Hamdi; Atheymen, Rim; Hakim, Ahmed; Sahnoun, Zouheir

doi:10.5812/asjsm.34607

Cited by 49 publications

(49 citation statements)

References 41 publications

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“…Indeed, the enhanced reaction time aff orded by energy shots over the placebo in the current study mimics results of others ( Jacobson & Edgley, 1987 ;Souissi, et al ., 2012 ). However, such small diff erences (msec.)…”

Section: Discussionsupporting

confidence: 90%

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Effect of Energy Drinks on Selected Fine Motor Tasks

et al. 2015

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This study assessed the effect of energy shots on selected fine motor tasks. The participants were college-age male (n=19; M age=20.5 yr., SD=0.7) and female (n=21; M age=21.1 yr., SD=0.7) volunteers who were assessed on hand steadiness, choice reaction time, rotary pursuit, and simple reaction time. The energy shots group scored significantly poorer on the hand steadiness tests and significantly better on choice reaction time and simple reaction time tests. The enhanced reaction time and disruption in hand steadiness afforded by energy shots would not be apparent in many gross motor activities, but it is possible that reaction time improvement could be beneficial in sports that require quick, reflexive movements. However, the potential adverse psychological and physiological effects warrant discretionary use of such products.

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Section: Discussionsupporting

confidence: 90%

“…Another study reported improved reaction times while at the same time increasing perceptions of alertness and focus ( Hoff man, Kang, Ratamess, Hoff man, Tranchina, & Faigenbaum, 2009 ). More recently researchers have found caff eine reduces simple reaction time ( Howard & Marczinski, 2010 ;Souissi, Abedelmalek, Chtourou, Atheymen, Hakim, & Sahnoun, 2012 ),…”

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confidence: 99%

Effect of Energy Drinks on Selected Fine Motor Tasks

et al. 2015

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“…However, it is possible that slow-twitch fibers are more sensitive to such action than fast-twitch fibers 34,35 , which could help to explain the limited ergogenic effect upon maximal strength and muscle power. In their evaluation of the contractile properties of skeletal muscle, Souissi et al 24 , Souissi et al 25 , Silva et al 23 and Glaister et al 26 suggest that the positive benefit of caffeine use in cyclists may be more effective in longer time evaluations of muscle power compared to shorter tests. Thus further research is needed to elucidate the ergogenic effects of caffeine during muscle strength exercises.…”

Section: Discussionmentioning

confidence: 99%

“…Three of these studies [23][24][25] used the Wingate test; the other study 26 used seven sprints for a maximum of 10 seconds. The average dosage of caffeine was 6.5 mg/kg of body weight.…”

Section: Description Of the Included Studiesmentioning

confidence: 99%

Acute effects of caffeine intake on athletic performance: A systematic review and meta-analysis

et al. 2017

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“…In contrast, a slight improvement in reaction time has been seen following the ingestion of caffeine. 29,34,86,87 This finding may allow athletes who supplement with caffeine to mask the deficits in reaction time following a concussion.…”

Section: Reaction Timementioning

confidence: 89%

The Effects of Caffeine on Reaction Time of Two Neurocognitive Tests

Petit

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Context: A concussion is defined as a traumatically induced transient disturbance of the brain caused by a biomechanical force. These problematic injuries can prevent athletes from participating in physical activity for a number of days, weeks, or even months. Caffeine is known for improving mental alertness in everyday tasks and is found in many popular drinks such as, coffee, tea, energy shots, and even soda. Due to its increase in memory, mental alertness, and concentration, caffeine could potentially be utilized to improve the outcomes of post-concussion neurocognitive testing. This improvement would allow athletes to return to play before they have returned to full health, thus potentially setting them up for further brain trauma. Objective: To evaluate caffeine's effect on reaction time (RT) when measured with two neurocognitive evaluation tools. Design: Cross-sectional Observation. Setting: Athletic Training Laboratory. Patients or Other Participants: Eighteen (14 male and 4 female) (Age = 21.7 ± 1.4 years, Height = 175.0 ± 9.1 cm, Weight = 75.6 ± 12.5 kg) healthy collegestudents participated in the current study. They were excluded if they had a history of high blood pressure, diagnosed heart condition, neurocognitive disorder or clinically diagnosed mental illness, more than one concussion in their lifetime or one within the last year, caffeine sensitivity, currently taking any prescribed medications, except birth control, ingest more than 500mg of caffeine daily or have been exposed to Immediate Post-Concussion Assessment and Cognitive Testing (ImPACT) or Kind-Devick tests within the last year. Interventions: Participants were randomly assigned into either a caffeine or placebo group. Following ingestion of the intervention, participants waited 45 minutes to begin their first assessment, either ImPACT or the King-Devick (KD) Test. Immediately following the first assessment, participants were evaluated using the other neurocognitive tool. Follow-up testing was conducted one week later under the opposite intervention. The testing order remained the same between the two testing sessions. Main Outcome Measures: The reaction time composite score produced by ImPACT and the overall King-Devick time were recorded and evaluated for initial testing and the follow-up appointment. These domains were compared to evaluate caffeine's effect on reaction time compared to the placebo intervention. Scores were also evaluated for each testing session regardless of the intervention. This evaluation will indicate if there is a practice effect overtime. Results: A significant improvement was noted in the ImPACT RT score following ingestion of the stimulant (0.53 ± 0.05 seconds) compared to the placebo substance (0.56 ± 0.07 seconds, P=.007). The KD test resulted in a significant decrease in overall time between testing session 1 and testing session 2, suggesting a practice effect (38.2 ± 5.6 seconds, 35.5 ± 5 seconds, P= ≤ 0.001). Conclusions:Participants of the current study were able to identify a computerized stimuli 0.03 ...

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Effects of Morning Caffeine’ Ingestion on Mood States, Simple Reaction Time, and Short-Term Maximal Performance on Elite Judoists

Cited by 49 publications

References 41 publications

Effect of Energy Drinks on Selected Fine Motor Tasks

Effect of Energy Drinks on Selected Fine Motor Tasks

Acute effects of caffeine intake on athletic performance: A systematic review and meta-analysis

The Effects of Caffeine on Reaction Time of Two Neurocognitive Tests

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