Effect of creatine supplementation and sleep deprivation, with mild exercise, on cognitive and psychomotor performance, mood state, and plasma concentrations of catecholamines and cortisol

McMorris, Terry; Harris, Roger C.; Swain, Jonathan P.; Corbett, Jo; Collard, Keith J.; Dyson, Rosemary; Dye, Louise; Hodgson, Christopher I.; Draper, Nick

doi:10.1007/s00213-005-0269-z

Cited by 121 publications

(90 citation statements)

References 37 publications

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“…The POMS measures individuals' perception of fatigue, vigour, anger, depression and tension. Research evidence suggests that mood state can influence physiological performance, and thus have an affect on climbing performance (Beedie, Terry, & Lane, 2000;McMorris et al, 2006). The reliability of the POMS has been confirmed by Grove and Prapavessis (1992), through comparing the mood states of winners and losers; it was found that all subscales, except fatigue, produced significant differences between these groups.…”

Section: Measures Of Anxiety In Current Climbing Literaturementioning

confidence: 81%

Current understanding in climbing psychophysiology research

et al. 2014

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The sport of rock climbing places a significant physiological and psychological load on participants. Psychophysiological analysis provides a unique insight into affective states arising from the demands of climbing, and the impact that they have on performance. This review provides an overview of climbing psychophysiology research completed to date. To summarise, an on-sight lead ascent of a route elicits the greatest psychophysiological response in climbers, whilst a red-point top-rope ascent produces the least. The effects of climbing stimuli on an individual's performance appear to be conditional on their experience. In general, experienced climbers show superior performance and are less anxious than their less practiced counterparts, with significantly lower cognitive and somatic anxiety, increased self-confidence and lower values of the steroid stress hormone cortisol. It is likely that the experience-stressor-performance relationship is due to advanced climbers' greater understanding of the risks associated with the sport, their habituation to the stressors gained through practice and their ability to perform well with higher levels of anxiety. This review outlines pertinent psychological climbing stimuli, summarises current methodologies and presents a detailed review of climbing psychophysiology research. It also concludes with suggestions for improving the depth and breadth of future research, including the need for the refinement of existing measures.

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Section: Measures Of Anxiety In Current Climbing Literaturementioning

confidence: 81%

Current understanding in climbing psychophysiology research

et al. 2014

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“…Increases in glucose availability, from the ingestion of sugars or the release of the acute stress hormone norepinephrine, improve memory (Wenk 1989;Foster et al 1998), with the effects being particularly pronounced in demanding tasks (Sunram-Lea et al 2002). Creatine, a nutrient that improves energy availability, also appears to benefit overall cognitive performance (Rae et al 2003) and reduce mental fatigue (Watanabe et al 2002;McMorris et al 2006). Besides being an energy source, food can contribute to cognition by providing amino acids needed in the production of neurotransmitters, which is particularly important during periods of stress or sustained concentration (Banderet and Lieberman 1989;Deijen et al 1999;Lieberman 2003).…”

Section: Drugsmentioning

confidence: 99%

Cognitive Enhancement: Methods, Ethics, Regulatory Challenges

2009

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Cognitive enhancement takes many and diverse forms. Various methods of cognitive enhancement have implications for the near future. At the same time, these technologies raise a range of ethical issues. For example, they interact with notions of authenticity, the good life, and the role of medicine in our lives. Present and anticipated methods for cognitive enhancement also create challenges for public policy and regulation.

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“…The authors speculated that creatine supplementation may be beneficial in those with the apoE 14 gene. Earlier McMorris et al (7) had reported in those who were sleep-deprived for 24 h that creatine supplementation had a positive effect on mood and cognition. A review (1) concluded that in experimental paradigms of neurological diseases, supplementation with creatine can reduce neuronal loss.…”

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confidence: 92%

The influence of creatine supplementation on the cognitive functioning of vegetarians and omnivores

Benton

Donohoe

2010

Br J Nutr

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Creatine when combined with P forms phosphocreatine that acts as a reserve of high-energy phosphate. Creatine is found mostly in meat, fish and other animal products, and the levels of muscle creatine are known to be lower in vegetarians. Creatine supplementation influences brain functioning as indicated by imaging studies and the measurement of oxygenated Hb. Given the key role played by creatine in the provision of energy, the influence of its supplementation on cognitive functioning was examined, contrasting the effect in omnivores and vegetarians. Young adult females (n 128) were separated into those who were and were not vegetarian. Randomly and under a double-blind procedure, subjects consumed either a placebo or 20 g of creatine supplement for 5 d. Creatine supplementation did not influence measures of verbal fluency and vigilance. However, in vegetarians rather than in those who consume meat, creatine supplementation resulted in better memory. Irrespective of dietary style, the supplementation of creatine decreased the variability in the responses to a choice reaction-time task.Key words: Attention: Creatine: Memory: Reaction times: Vegetarians When creatine combines with P to form phosphocreatine, it acts as a reserve of high-energy phosphate that is used to rapidly convert ADP back to adenosine triphosphate (1) . In humans, although 95 % of the total creatine pool is found in skeletal muscle, high levels are also found in the heart, brain and testes. In particular, it is surprising that the influence of brain creatine status has not attracted more interest as the brain is the most metabolically active organ in the body, accounting for 20 % of BMR, although it represents only about 2 % of body weight (2) . The present study has therefore examined the influence of creatine supplementation on human cognition, in particular comparing the response of vegetarians and omnivores as there are reports that a vegetarian diet is associated with poorer creatine status (3) .

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Effect of creatine supplementation and sleep deprivation, with mild exercise, on cognitive and psychomotor performance, mood state, and plasma concentrations of catecholamines and cortisol

Abstract: Following 24-h sleep deprivation, creatine supplementation had a positive effect on mood state and tasks that place a heavy stress on the prefrontal cortex.

Cited by 121 publications

References 37 publications

Current understanding in climbing psychophysiology research

Current understanding in climbing psychophysiology research

Cognitive Enhancement: Methods, Ethics, Regulatory Challenges

The influence of creatine supplementation on the cognitive functioning of vegetarians and omnivores

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