Impact of first meal size during prolonged sitting on postprandial glycaemia in individuals with prediabetes: a randomised, crossover study
Journal article
Parr, Evelyn, Devlin, Brooke, Pinto, Samuel, Dunstan, David and Hawley, John. (2018). Impact of first meal size during prolonged sitting on postprandial glycaemia in individuals with prediabetes: a randomised, crossover study. Nutrients. 10(6), pp. 1 - 15. https://doi.org/10.3390/nu10060733
Authors | Parr, Evelyn, Devlin, Brooke, Pinto, Samuel, Dunstan, David and Hawley, John |
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Abstract | We compared the impact of a high versus low energy intake first meal on glucose and insulin responses during prolonged sitting in individuals with prediabetes. Thirteen adults with overweight/obesity and prediabetes (mean ± SD age: 60 ± 6 years, BMI: 33 ± 4 kg/m2; 2 h OGTT: 8.9 ± 1.1 mmol/L) completed two randomised trials: 10 h uninterrupted sitting, incorporating three meals with matching macronutrient compositions but different energy distributions: High-Energy Breakfast (HE-BF; breakfast: 50%, lunch: 30%, dinner: 20% energy intake), Low-Energy Breakfast (LE-BF: 20%/30%/50% energy intake). Venous blood was sampled from 08:00–18:00 h for determination of plasma glucose and insulin concentrations, with 24 h continuous glucose monitoring (CGM). Total glucose area under the curve (AUC; +5.7 mmol/L/h, p = 0.019) and mean plasma glucose concentrations (+0.5 mmol/L, p = 0.014) were greater after HE-BF compared to LE-BF. In the HE-BF condition, compared to LE-BF, there was a greater incremental area under the curve (iAUC) for plasma glucose post-breakfast (+44 ± 59%, p = 0.007), but lower iAUC post-lunch (−55 ± 36%, p < 0.001). Total insulin AUC was greater (+480 mIU/mL/h, p < 0.01) after HE-BF compared to LE-BF. Twenty-four-hour (24 h) CGM revealed no differences in mean glucose and total AUC between conditions. Compared to a low-energy first meal, a high-energy first meal elicited exaggerated plasma insulin and glucose responses until lunch but had little effect on 24 h glycaemia. During periods of prolonged sitting, adults with prediabetes may have more beneficial postprandial insulin responses to a low-energy first meal |
Keywords | glyacemic control; breakfast; obesity; sedentary behavior; insulin; energy distribution |
Year | 2018 |
Journal | Nutrients |
Journal citation | 10 (6), pp. 1 - 15 |
Publisher | MDPI AG |
ISSN | 2072-6643 |
Digital Object Identifier (DOI) | https://doi.org/10.3390/nu10060733 |
Scopus EID | 2-s2.0-85048343816 |
Open access | Open access |
Page range | 1 - 15 |
Research Group | Mary MacKillop Institute for Health Research |
Publisher's version | License |
Place of publication | Switzerland |
Editors | J. Buckley |
https://acuresearchbank.acu.edu.au/item/8qvqx/impact-of-first-meal-size-during-prolonged-sitting-on-postprandial-glycaemia-in-individuals-with-prediabetes-a-randomised-crossover-study
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