Tyrosine improves cognitive performance and reduces blood pressure in cadets after one week of a combat training course

Tyrosine improves cognitive performance and reduces blood pressure in cadets after one week of a combat training course

The effects of the amino acid tyrosine on cognitive task performance were studied on a group of 21 cadets during a demanding military combat training course. In addition, the effects on mood, blood pressure and the norepinephrine metabolite MHPG were determined. Ten subjects received five daily dose...

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Bibliographic Details
Published in:Brain research bulletin Vol. 48; no. 2; pp. 203 - 209
Main Authors: Deijen, J.B, Wientjes, C.J.E, Vullinghs, H.F.M, Cloin, P.A, Langefeld, J.J
Format: Journal Article
Language:English
Published: New York, NY Elsevier Inc 15-01-1999
Elsevier Science
Subjects:
Adolescent
Adult
Affect - drug effects
Anxiety - psychology
Biological and medical sciences
Blood pressure
Blood Pressure - drug effects
Cognition - drug effects
Cognitive performance
Combat course
Female
Fundamental and applied biological sciences. Psychology
Humans
Male
Methoxyhydroxyphenylglycol - blood
Mood
Psychomotor Performance - drug effects
Stress
Stress, Psychological - physiopathology
Tyrosine
Tyrosine - pharmacology
Vertebrates: body movement. Posture. Locomotion. Flight. Swimming. Physical exercise. Rest. Sports
Tyrosine
Combat course
Cognitive performance
Blood pressure
Mood
Stress
Physical exercise
Human
Aminoacid
Fatigue
Cognition
Hemodynamics
Military
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Summary:The effects of the amino acid tyrosine on cognitive task performance were studied on a group of 21 cadets during a demanding military combat training course. In addition, the effects on mood, blood pressure and the norepinephrine metabolite MHPG were determined. Ten subjects received five daily doses of a protein-rich drink containing 2 g tyrosine, and 11 subjects received a carbohydrate rich drink with the same amount of calories (255 kcal). Assessments were made both immediately prior to the combat course and on the 6th day of the course. The group supplied with the tyrosine-rich drink performed better on a memory and a tracking task than the group supplied with the carbohydrate-rich drink. In addition, the supplementation of tyrosine decreased systolic blood pressure. No effects on mood were found. These findings suggest that supplementation with tyrosine may, under operational circumstances characterized by psychosocial and physical stress, reduce the effects of stress and fatigue on cognitive task performance.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ObjectType-News-3
ISSN:0361-9230
1873-2747
DOI:10.1016/S0361-9230(98)00163-4