Be Healthy in Pregnancy (B-HIP): A Trial to Study Nutrition and Exercise Approaches for Healthy Pregnancy
Be Healthy in Pregnancy (B-HIP): A Randomized Clinical Trial (RCT) to Study Nutrition and Exercise Approaches for Healthy Pregnancy
Weight gained during pregnancy is referred to as gestational weight gain (GWG). Excess GWG
is a widespread problem that occurs in 55-75% of Canadian women who enter pregnancy
overweight or obese (a group that represents over 50 % of all pregnant women) and about 40%
women of normal weight. Excess GWG is associated with complications of pregnancy, such as
post-partum weight retention, type 2 diabetes, elevated fats in the blood, and high blood
pressure and may also lead to problems with the health of the newborn child. Our research
aims to find ways to control GWG by developing new and practical approaches to diet and
exercise targeted to overweight pregnant women that hold promise of improving their health
both during pregnancy and thereafter. The experimental intervention is a diet of higher
protein provided by dairy foods combined with an exercise program modified to the abilities
of overweight pregnant women; and the control is the usual advice given by their primary
care providers, information on healthy pregnancy from Health Canada, and a focus group
session exploring women's experiences with exercise, nutrition, and gestational weight gain.
The results of this study will allow us to design future large clinical studies in all
pregnant women to help control the weight gain in all pregnant women.
This will be a 2-arm randomized 1-site trial. Recruitment will be within the community care
clinics by poster and flyer advertisements.
Primary research question: Among pregnant women, does introducing a structured and monitored
nutrition and exercise program (treatment) in early pregnancy compared with Usual Prenatal
Care (control) increase the likelihood of attaining gestational weight gain within the
Institute of Medicine (IOM) guidelines over the pregnancy period?
Experimental and Control groups: Both groups of mothers and their health care providers will
be given the Health Canada materials on "Healthy Weight Gain during Pregnancy", "Eating Well
with Canada's Food Guide" and the "Pregnancy Weight Gain Calculator". Baseline information
will be recorded for eligible and consenting women after which they will be randomized to
Experimental or Control group. Nutrition intake, physical measures and physical activity
will be recorded at baseline, 26-28 weeks and 36-38 weeks of gestation and 6 months post
partum in the same manner for both groups. All mothers will receive the study promotional
materials and small incentives. Also, all mothers will be followed by their primary care
provider and have usual access to Public Health.
Excessive Weight Gain in Pregnancy as Antepartum Condition, Obesity, Weight Gain, Type 2 Diabetes
Excess gestational weight gain (GWG), Obesity, Type 2 diabetes, Elevated fats in the blood, High blood pressure
McMaster University, Dairy Farmers of Canada