Carbohydrate and fluid intake affect the saliva flow rate and IgA response to cycling

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Carbohydrate and fluid intake affect the saliva flow rate and IgA response to cycling. / Bishop, N C; Blannin, Andrew; Armstrong, E; Rickman, M; Gleeson, Michael.

In: Medicine and Science in Sports and Exercise, Vol. 32, No. 12, 12.2000, p. 2046-51.

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@article{7e8a6951b3b1426eafe9a6c1550edcd6,
title = "Carbohydrate and fluid intake affect the saliva flow rate and IgA response to cycling",
abstract = "PURPOSE: The purpose of this study was to examine the effect of regular CHO beverage ingestion and restricted fluid intake on various salivary parameters during prolonged cycle exercise.METHODS: In a randomized block design, 15 recreationally active men cycled for 2 h at 60% VO2max on three occasions, separated by 1 wk. On the CHO and placebo (PLA) treatments, subjects consumed either a glucose (60 g x L(-1)) or placebo drink before (400 mL), during (150 mL every 15 min), and after (400 mL) the exercise. On the restricted fluid intake (RFI) treatment subjects were given a total of 200 mL of placebo fluid to take as desired every 15-min during the exercise. Timed, unstimulated saliva samples were collected preexercise, at 1, 1.5, and 2 h of exercise and at 1 h postexercise. Blood samples were obtained from a subset of 8 subjects preexercise, postexercise, and at 1 h postexercise.RESULTS: Postexercise plasma glucose levels were 18% and 20% lower on the PLA and RFI treatments, respectively, compared with the CHO treatment (P < 0.01). Saliva flow rates were significantly higher on the CHO treatment compared with the RFI treatment at 1.5 h and 2 h of exercise (P < 0.01 and P < 0.05, respectively). Salivary IgA (s-IgA) concentration was significantly lower on the CHO treatment compared with the RFI treatment throughout the exercise (P < 0.05). No other differences were seen between treatments for either saliva flow rate or s-IgA concentration. Neither s-IgA secretion rate, alpha-amylase activity, nor alpha-amylase secretion rate were affected by treatment.CONCLUSIONS: These findings suggest that CHO and fluid intake influence the s-IgA and saliva flow rate response to prolonged submaximal exercise.",
keywords = "Adult, Beverages, Bicycling, Dietary Carbohydrates, Humans, Immunoglobulin A, Male, Saliva, Salivation, alpha-Amylases, Clinical Trial, Journal Article, Randomized Controlled Trial",
author = "Bishop, {N C} and Andrew Blannin and E Armstrong and M Rickman and Michael Gleeson",
year = "2000",
month = dec,
language = "English",
volume = "32",
pages = "2046--51",
journal = "Medicine and Science in Sports and Exercise",
issn = "0195-9131",
publisher = "American College of Sports Medicine",
number = "12",

}

RIS

TY - JOUR

T1 - Carbohydrate and fluid intake affect the saliva flow rate and IgA response to cycling

AU - Bishop, N C

AU - Blannin, Andrew

AU - Armstrong, E

AU - Rickman, M

AU - Gleeson, Michael

PY - 2000/12

Y1 - 2000/12

N2 - PURPOSE: The purpose of this study was to examine the effect of regular CHO beverage ingestion and restricted fluid intake on various salivary parameters during prolonged cycle exercise.METHODS: In a randomized block design, 15 recreationally active men cycled for 2 h at 60% VO2max on three occasions, separated by 1 wk. On the CHO and placebo (PLA) treatments, subjects consumed either a glucose (60 g x L(-1)) or placebo drink before (400 mL), during (150 mL every 15 min), and after (400 mL) the exercise. On the restricted fluid intake (RFI) treatment subjects were given a total of 200 mL of placebo fluid to take as desired every 15-min during the exercise. Timed, unstimulated saliva samples were collected preexercise, at 1, 1.5, and 2 h of exercise and at 1 h postexercise. Blood samples were obtained from a subset of 8 subjects preexercise, postexercise, and at 1 h postexercise.RESULTS: Postexercise plasma glucose levels were 18% and 20% lower on the PLA and RFI treatments, respectively, compared with the CHO treatment (P < 0.01). Saliva flow rates were significantly higher on the CHO treatment compared with the RFI treatment at 1.5 h and 2 h of exercise (P < 0.01 and P < 0.05, respectively). Salivary IgA (s-IgA) concentration was significantly lower on the CHO treatment compared with the RFI treatment throughout the exercise (P < 0.05). No other differences were seen between treatments for either saliva flow rate or s-IgA concentration. Neither s-IgA secretion rate, alpha-amylase activity, nor alpha-amylase secretion rate were affected by treatment.CONCLUSIONS: These findings suggest that CHO and fluid intake influence the s-IgA and saliva flow rate response to prolonged submaximal exercise.

AB - PURPOSE: The purpose of this study was to examine the effect of regular CHO beverage ingestion and restricted fluid intake on various salivary parameters during prolonged cycle exercise.METHODS: In a randomized block design, 15 recreationally active men cycled for 2 h at 60% VO2max on three occasions, separated by 1 wk. On the CHO and placebo (PLA) treatments, subjects consumed either a glucose (60 g x L(-1)) or placebo drink before (400 mL), during (150 mL every 15 min), and after (400 mL) the exercise. On the restricted fluid intake (RFI) treatment subjects were given a total of 200 mL of placebo fluid to take as desired every 15-min during the exercise. Timed, unstimulated saliva samples were collected preexercise, at 1, 1.5, and 2 h of exercise and at 1 h postexercise. Blood samples were obtained from a subset of 8 subjects preexercise, postexercise, and at 1 h postexercise.RESULTS: Postexercise plasma glucose levels were 18% and 20% lower on the PLA and RFI treatments, respectively, compared with the CHO treatment (P < 0.01). Saliva flow rates were significantly higher on the CHO treatment compared with the RFI treatment at 1.5 h and 2 h of exercise (P < 0.01 and P < 0.05, respectively). Salivary IgA (s-IgA) concentration was significantly lower on the CHO treatment compared with the RFI treatment throughout the exercise (P < 0.05). No other differences were seen between treatments for either saliva flow rate or s-IgA concentration. Neither s-IgA secretion rate, alpha-amylase activity, nor alpha-amylase secretion rate were affected by treatment.CONCLUSIONS: These findings suggest that CHO and fluid intake influence the s-IgA and saliva flow rate response to prolonged submaximal exercise.

KW - Adult

KW - Beverages

KW - Bicycling

KW - Dietary Carbohydrates

KW - Humans

KW - Immunoglobulin A

KW - Male

KW - Saliva

KW - Salivation

KW - alpha-Amylases

KW - Clinical Trial

KW - Journal Article

KW - Randomized Controlled Trial

M3 - Article

C2 - 11128850

VL - 32

SP - 2046

EP - 2051

JO - Medicine and Science in Sports and Exercise

JF - Medicine and Science in Sports and Exercise

SN - 0195-9131

IS - 12

ER -