Interaction between dietary fat and exercise on excess postexercise oxygen consumption Article

cited authors

  • Frost, Elizabeth A., Redman, Leanne M., de Jonge, Lilian, Rood, Jennifer, Zachwieja, Jeffrey J., Volaufova, Julia, Bray, George A., Smith, Steven R.

funding text

  • This work was supported by the US Department of Agriculture Grant 96034323-3031. L. M. Redman is supported by NIH Pathway to Independence award, R00 HD-060762.

abstract

  • The objective of this study was to determine the effect of increased physical activity on subsequent sleeping energy expenditure (SEE) measured in a whole room calorimeter under differing levels of dietary fat. We hypothesized that increased physical activity would increase SEE. Six healthy young men participated in a randomized, single-blind, crossover study. Subjects repeated an 8-day protocol under four conditions separated by at least 7 days. During each condition, subjects consumed an isoenergetic diet consisting of 37% fat, 15% protein, and 48% carbohydrate for the first 4 days, and for the following 4 days SEE and energy balance were measured in a respiration chamber. The first chamber day served as a baseline measurement, and for the remaining 3 days diet and activity were randomly assigned as high-fat/exercise, high-fat/sedentary, low-fat/exercise, or low-fat/sedentary. Energy balance was not different between conditions. When the dietary fat was increased to 50%, SEE increased by 7.4% during exercise (P < 0.05) relative to being sedentary (baseline day), but SEE did not increase with exercise when fat was lowered to 20%. SEE did not change when dietary fat was manipulated under sedentary conditions. Physical activity causes an increase in SEE when dietary fat is high (50%) but not when dietary fat is low (20%). Dietary fat content influences the impact of postexercise-induced increases in SEE. This finding may help explain the conflicting data regarding the effect of exercise on energy expenditure.

Publication Date

  • May 1, 2014

webpage

category

start page

  • E1093

end page

  • E1098

volume

  • 306

issue

  • 9

WoS Citations

  • 3

WoS References

  • 27