Effects of Carbohydrate Beverage Ingestion on the Salivary IgA Response to Intermittent Exercise in the Heat

Abstract The purpose of this study was to establish if provision of CHO altered the mucosal immune and salivary cortisol responses to intermittent exercise in the heat. In a double-blind design, 10 males undertook soccer-specific intermittent exercise on a motorized treadmill on 2 occasions, each ov...

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Bibliographic Details
Published in:International journal of sports medicine 2011-09, Vol.32 (9), p.659-665
Main Authors: Sari-Sarraf, V., Doran, D. A., Clarke, N. D., Atkinson, G., Reilly, T.
Format: Article
Language:English
Subjects:
Adult
Biological and medical sciences
body weight
Carbohydrates
Dietary Carbohydrates - administration & dosage
Dietary Carbohydrates - pharmacology
Double-Blind Method
Exercise (duration)
Exercise Test
Flow rates
Fundamental and applied biological sciences. Psychology
Heart rate
Heart Rate - physiology
Heat
Hormones
Hot Temperature
Humans
Hydrocortisone - metabolism
Immunoglobulin A - metabolism
Ingestion
Male
Osmolar Concentration
Perception
Physical Exertion - physiology
Physiology & Biochemistry
Professional sports
Proteins
Saliva - immunology
Saliva - metabolism
Soccer
Sports medicine
Time Factors
Vertebrates: body movement. Posture. Locomotion. Flight. Swimming. Physical exercise. Rest. Sports
Young Adult
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Summary:Abstract The purpose of this study was to establish if provision of CHO altered the mucosal immune and salivary cortisol responses to intermittent exercise in the heat. In a double-blind design, 10 males undertook soccer-specific intermittent exercise on a motorized treadmill on 2 occasions, each over 90 min and separated by 1 week. During CHO and placebo trials, subjects were given either a carbohydrate solution (3 ml · kg −1 body weight) or placebo drink, 5 min before the commencement of exercise, at 15, 30 min, at half time, 60 and 75 min into exercise. Salivary flow rate increased throughout the placebo trial and decreased throughout the CHO treatment; the difference between conditions neared statistical significance (P=0.055). Neither s-IgA concentration nor s-IgA to osmolality ratio was affected by 2 conditions or differed at any time-point post-exercise (P>0.05). The s-IgA secretion rate increased, s-IgA to protein ratio decreased post-exercise and salivary cortisol decreased 24 h post-exercise (P
ISSN:0172-4622
1439-3964
DOI:10.1055/s-0031-1271698