Influence of a fed or fasted state on the s-IgA response to prolonged cycling in active men and women
Tools
Tools
Allgrove, Judith E., Geneen, Louise, Latif, Sarah and Gleeson, Michael (2009) Influence of a fed or fasted state on the s-IgA response to prolonged cycling in active men and women. International Journal of Sport Nutrition and Exercise Metabolism, 19 (3). pp. 209-221. ISSN 1526-484X
Full text not available from this repository.Abstract
This study investigated the effect of a fed or fasted state on the salivary immunoglobulin A (s-IgA) response to prolonged cycling. Using a randomized, crossover design, 16 active adults (8 men and 8 women) performed 2 hr of cycling on a stationary ergometer at 65% of maximal oxygen uptake on 1 occasion after an overnight fast (FAST) and on another occasion 2 hr after consuming a 2.2-MJ high-carbohydrate meal (FED). Timed, unstimulated whole saliva samples were collected immediately before ingestion of the meal, immediately preexercise, 5 min before cessation of exercise, immediately postexercise, and 1 hr postexercise. The samples were analyzed for s-IgA concentration, osmolality, and cortisol, and saliva flow rates were determined to calculate s-IgA secretion rate. Saliva flow rate decreased by 50% during exercise (p < .05), and s-IgA concentration increased by 42% (p < .05), but s-IgA secretion rate remained unchanged. There was a 37% reduction in s-IgA:osmolality postexercise (p < .05), and salivary cortisol increased by 68% (p < .05). There was no effect of FED vs. FAST on these salivary responses. The s-IgA concentration, secretion rate, and osmolality were found to be significantly lower in women than in men throughout the exercise protocol (p < .05); however, there was no difference between genders in saliva flow rate, s-IgA:osmolality ratio, or cortisol. These data demonstrate that a fed or fasted state 2 hr before exercise does not influence resting s-IgA or the response to prolonged cycling. Furthermore, these results show lower levels of s-IgA and osmolality in women than in men at rest.
| Item Type: | Article |
|---|---|
| Additional Information: | [1] ISSN 1526-484X (Print), 1543-2742 (Online). |
| Uncontrolled Keywords: | salivary immunoglobulin A, s-IgA, cycling, exercise, nutritional status, salivary flow rate |
| Subjects: | R Medicine > RC Internal medicine > RC1200 Sports Medicine |
| Faculty / School / Research Centre / Research Group: | Faculty of Education, Health & Human Sciences > School of Human Sciences (HUM) |
| Related URLs: | |
| Last Modified: | 09 Oct 2021 04:46 |
| URI: | http://gala.gre.ac.uk/id/eprint/1937 |
Actions (login required)
 |
View Item |