Degree Type

Thesis

Date of Award

2013

Degree Name

Master of Science

Department

Food Science and Human Nutrition

First Advisor

Christina G. Campbell

Abstract

The benefits of physical activity (PA) during pregnancy have been well documented, but little is known about the contribution of activity sub-components including sleep, sedentary, light, moderate, and vigorous activity on gestational weight gain (GWG). Additionally, the relationship between diet quality and GWG has yet to be determined. A prospective, longitudinal study was conducted during 2nd and 3rd trimester to objectively quantify and identify modifiable aspects of total PA including sleep, sedentary, light, moderate, and vigorous activity, and dietary intake. Participants (n=46) wore a SenseWear Armband and an activPALTM activity monitor for seven consecutive days during which a weighed 3-day diet record was also completed. Paired t-tests were used to compare data across pregnancy and multiple regression was used to identify predictors of GWG. Time spent in nighttime sleep, naps, sedentary behavior (SB), and moderate PA did not change across pregnancy while light and vigorous PA significantly decreased. During both the 2nd and 3rd trimester women spent an average of 75% of time awake in sedentary behavior even though 65% (week 18) and 61% (week 35) met the prenatal PA recommendations. Additionally, prediction equations showed positive correlations between protein intake (P = 0.071) and MET-minutes (P = 0.038) with GWG at week 18 (R2 = 0.29, rMSEP = 2.18); and between carbohydrate intake (P = 0.098) and MET-minutes (P = 0.038) with GWG at week 35 (R2 = 0.19, rMSEP = 3.99). Due to the large portion of the day spent in SB regardless of whether or not prenatal PA recommendations were met, and the observed relationship between total activity (MET-minutes) and weight gain across pregnancy, an overall increase in activity during pregnancy should be promoted. Furthermore, dietary quality of CHO should be investigated with respect to GWG.

Copyright Owner

Diana Rose Di Fabio

Language

en

File Format

application/pdf

File Size

145 pages

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