Effect of tyrosine ingestion on cognitive and physical performance utilising an intermittent soccer performance test (iSPT) in a warm environment

Coull, Nicole A.; Watkins, S. L.; Aldous, Jeffrey William Frederick; Warren, Lee K.; Chrismas, Bryna C. R.; Dascombe, Ben J.; Mauger, Alexis R.; Abt, Grant; Taylor, Lee

doi:10.1007/s00421-014-3022-7

Cited by 32 publications

(47 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Tyrosine supplementation has been demonstrated to be most effective in situations of significant stress, physical, cognitive or otherwise. As such, the studies covered: cognitive demand [66][67][68]71] and external stressors such as noise and thermal changes [69,70,72]. One study evaluated whether tyrosine would modulate the effect of transcranial direct current stimulation on working memory performance [73].…”

Section: Tyrosine (Protein)mentioning

confidence: 99%

“…Under cognitively stressed conditions tyrosine improved working memory [66] and various aspects of executive function, namely inhibitory control [67], cognitive flexibility (smaller switching costs) [71] and creative convergent thinking [68]. Although tyrosine had no impact on cognitive performance in warm/hot environments [72], when heat stress was combined with physical exertion, tyrosine supplementation enhanced vigilance [69]. Changes in the event-related potentials N100, P300 and Contingent Negative Variation (CNV), also reflected enhanced attention and executive function related to stimulus evaluation and decision-making [70].…”

Section: Tyrosine (Protein)mentioning

confidence: 99%

“…Others showed positive effects on memory following supplementation with tyrosine [66,73], caffeine [43], flavonoids [48], gingko biloba [54,56], ginseng [57], and prebiotics [65]. In addition, enhanced effects on attention were observed in some studies that supplemented with tyrosine [69,70], caffeine [44] or ginseng [57], and a handful of studies showed improved executive function with tyrosine [67,68,71], omega-3 [28], or caffeine supplementation [43,44].…”

Section: Overall Synthesismentioning

confidence: 99%

See 2 more Smart Citations

A Systematic Review of the Effect of Dietary Supplements on Cognitive Performance in Healthy Young Adults and Military Personnel

Pomeroy¹,

Tooley²,

Probert³

et al. 2020

Nutrients

View full text Add to dashboard Cite

Intake of dietary supplements has increased, despite evidence that some of these have adverse side effects and uncertainty about their effectiveness. This systematic review examined the evidence for the cognitive benefits of a wide range of dietary supplements in healthy young adult samples; the aim was to identify if any might be useful for optimising cognitive performance during deployment in military personnel. Searches were conducted in 9 databases and 13 grey literature repositories for relevant studies published between January 2000 and June 2017. Eligible studies recruited healthy young adults (18–35 years), administered a legal dietary supplement, included a comparison control group, and assessed cognitive outcome(s). Thirty-seven of 394 identified studies met inclusion criteria and were included for synthesis. Most research was deemed of low quality (72.97%; SIGN50 guidelines), highlighting the need for sound empirical research in this area. Nonetheless, we suggest that tyrosine or caffeine could be used in healthy young adults in a military context to enhance cognitive performance when personnel are sleep-deprived. Caffeine also has the potential benefit of improving vigilance and attention during sustained operations offering little opportunity for sleep. Inconsistent findings and methodological limitations preclude firm recommendations about the use of other specific dietary supplements.

show abstract

Section: Tyrosine (Protein)mentioning

confidence: 99%

Section: Tyrosine (Protein)mentioning

confidence: 99%

Section: Overall Synthesismentioning

confidence: 99%

See 1 more Smart Citation

A Systematic Review of the Effect of Dietary Supplements on Cognitive Performance in Healthy Young Adults and Military Personnel

Pomeroy¹,

Tooley²,

Probert³

et al. 2020

Nutrients

View full text Add to dashboard Cite

show abstract

“…Very recently, Coull et al. () supplied tyrosine before the start of a soccer‐specific test [intermittent soccer‐specific test (Aldous et al., )] in 25 °C. Although an improvement in cognitive functioning was observed, performance, measured as distance covered, was not improved.…”

Section: Manipulating the Brain Before During And After Exercise Inmentioning

confidence: 99%

Neurophysiological effects of exercise in the heat

Roelands

Pauw

Meeusen

2015

Scandinavian Med Sci Sports

View full text Add to dashboard Cite

Fatigue during prolonged exercise is a multifactorial phenomenon. The complex interplay between factors originating from both the periphery and the brain will determine the onset of fatigue. In recent years, electrophysiological and imaging tools have been fine-tuned, allowing for an improved understanding of what happens in the brain. In the first part of the review, we present literature that studied the changes in electrocortical activity during and after exercise in normal and high ambient temperature. In general, exercise in a thermo-neutral environment or at light to moderate intensity increases the activity in the β frequency range, while exercising at high intensity or in the heat reduces β activity. In the second part, we review literature that manipulated brain neurotransmission, through either pharmacological or nutritional means, during exercise in the heat. The dominant outcomes were that manipulations changing brain dopamine concentration have the potential to delay fatigue, while the manipulation of serotonin had no effect and noradrenaline reuptake inhibition was detrimental for performance in the heat. Research on the effects of neurotransmitter manipulations on brain activity during or after exercise is scarce. The combination of brain imaging techniques with electrophysiological measures presents one of the major future challenges in exercise physiology/neurophysiology.

show abstract

“…Soccer is characterised by a variable and demanding fixture scheduling, whereby consecutive matches may be interspersed by only 2-3 days (Carling et al, 2015). Match-play and training can occur in environmental extremes of cold, hot and/or hypoxic climates Coull et al, 2015); with associated variable travel demands (Fullagar et al, 2015), these combine to increase the psychophysiological demands experienced by players across a season (i.e. "fatigue").…”

Section: Introductionmentioning

confidence: 99%

External training loads and smartphone-derived heart rate variability indicate readiness to train in elite soccer

Chrismas

Taylor

Thornton

et al. 2019

International Journal of Performance Analysis in Sport

Self Cite

View full text Add to dashboard Cite

Player readiness can affect the ability to perform and tolerate prescribed training load (TL); therefore, in a time-efficient and practice compatible manner, practitioners need objective evidence to inform readiness to train. Six male professional footballers (mean ± standard deviation [SD]; 26 ± 2 years, 79.0 ± 4.9 kg, 1.82 ± 0.05 m) participated. Heart rate variability (HRV) was recorded using a smartphone application prior to the daily training sessions (247 training sessions [41.17 ± 7.41 per player]). External TL was monitored during training using global positioning system devices. Linear mixed models were used to examine variations in HRV and TL across the study period and to determine relationships between HRV and TL. Differences in TL and HRV were expressed as standardised effect sizes (ES) ± 90% confidence limits. Changes in HRV (outcome) were expressed as the expected change for a 2-SD change in TL (predictor). Across the study period, all external TL measures varied substantially, demonstrating weekly fluctuations in load (ES range = 0.00-7.40). The relationship between morning HRV and external TL ranged from −0.10 for distance and 1.89 for equivalent distance index (EDI). Overall, EDI demonstrated the strongest relationship with morning HRV; therefore, EDI and smartphone-derived HRV may provide an indicator of readiness to train within elite soccer. ARTICLE HISTORY

show abstract

Effect of tyrosine ingestion on cognitive and physical performance utilising an intermittent soccer performance test (iSPT) in a warm environment

Cited by 32 publications

References 51 publications

A Systematic Review of the Effect of Dietary Supplements on Cognitive Performance in Healthy Young Adults and Military Personnel

A Systematic Review of the Effect of Dietary Supplements on Cognitive Performance in Healthy Young Adults and Military Personnel

Neurophysiological effects of exercise in the heat

External training loads and smartphone-derived heart rate variability indicate readiness to train in elite soccer

Contact Info

Product

Resources

About