Last year I posted results from a study which suggest that having a breakfast high in fibre may be more satiating for a smaller number of calories, and thus may be one important way to help manage hunger and thus caloric intake. Today I came across another new study which suggests that a breakfast high in fibre and with a low glycemic index (the degree to which an ingested food causes a spike in blood glucose levels) may enhance fat oxidation during a subsequent bout of exercise.
In this small study published in the Journal of Nutrition, 8 young and sedentary women participated in a randomized cross-over experiment in which on 2 separate days they consumed 1 of 2 breakfasts: both equal in carbohydrates, fat, protein and total calories, but with one being high-fibre/low-glycemic index while the other being low-fibre/high-glycemic index.
Three hours after the breakfast, the women were instructed to perform 60 minutes of fairly low intensity exercise (~50% of maximal oxygen uptake) during which their fuel (fat, carbohydrate, protein) oxidation was measured using indirect calorimetry.
The authors found that exercising after the high-fibre/low-glycemic index breakfast caused a doubling of the absolute total grams of fat burned during the bout in contrast to that seen post a low-fibre/high-glycemic index breakfast.
Yet another reason to dispense with the Fruit Loops…
Stevenson, E., Astbury, N., Simpson, E., Taylor, M., & Macdonald, I. (2009). Fat Oxidation during Exercise and Satiety during Recovery Are Increased following a Low-Glycemic Index Breakfast in Sedentary Women Journal of Nutrition, 139 (5), 890-897 DOI: 10.3945/jn.108.101956
This post was originally published on Obesitypanacea.com on April 23, 2009.