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- W2892449233 abstract "Obesity and strenuous exercise are independent stimuli with potential to modify immune function in opposition. Our purpose was to investigate transient salivary secretory immunoglobulin A concentration [sIgA] responses to short, strenuous exercise - a maximal graded exercise test (GXT) – in physically active, obese men. Eleven obese (35.5 ± 5.0 % body fat), healthy men performed a GXT on a mechanically-braked cycle ergometer. Unstimulated saliva was collected in basal state (Basal), immediately post-exercise (IPE), and 30 minutes post-exercise (30MPE). Heart rate and blood lactate concentrations were evaluated at the same time as saliva collection. Salivary [sIgA] was determined by ELISA and total protein concentration by Biuret assay. Saliva flow rate (SFR) was determined by dividing the total volume of saliva by the collection time in minutes. sIgA secretion rates were estimated using [sIgA] and SFR. During the GXT, heart rate increased from 77 ± 10 bpm at Basal measurement to 176 ± 16 bpm at IPE and remained elevated (92 ± 10 bpm) at 30 MPE (p < 0.0001). Blood lactate increased from 1.9 ± 0.7 to 12.1 ± 4.3 mMol/L at IPE and stayed elevated (4.9 ± 2.1 mMol/L) at 30MPE (p < 0.0001). Salivary [sIgA] increased by an average 81.7 μg/mL (~80%) from Basal (94.2 ± 45.0) at IPE and returned to basal levels (91.4 ± 34.5 μg/mL) at 30MPE (p= 0.003). Salivary sIgA secretion rate increased 73.5%; however, this response was not statistically significant (p = 0.11). Salivary protein and SFR remained unchanged after GXT. These findings provide evidence that short, strenuous exercise enhances, rather than suppresses, respiratory immune function in healthy obese males. SFR and sIgA secretion rates do not fully explain the higher post-exercise salivary sIgA observed in this study." @default.
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- W2892449233 date "2018-01-01" @default.
- W2892449233 modified "2023-09-24" @default.
- W2892449233 title "Effect of Short, Strenuous Exercise on Salivary IgA Levels in Obese Males" @default.
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