The impact of a long-term reduction in dietary energy density on body weight within a randomized diet trial.

Auteur(s) :
Pierce JP., Natarajan L., Rock CL., Flatt SW., Kealey S., Madlensky L., Saquib N.
Date :
Jan, 2008
Source(s) :
NUTR CANCER. #60:1 p31-8
Adresse :
Cancer Prevention and Control Program, Moores UCSD Cancer Center, University of California San Diego, La Jolla, CA 92093-0901, USA.

Sommaire de l'article

We examined the effect of dietary energy density change on body weight in participants of a randomized trial. Intervention participants markedly increased fruit and vegetable intake while reducing energy intake from fat. Participants were 2,718 breast cancer survivors, aged 26-74 yr, with baseline mean body mass index of 27.3 kg/m(2) (SD = 6.3). We assessed dietary intake by sets of four 24-h dietary recalls and validated with plasma carotenoid concentrations. Weight and height were measured at baseline, 1 yr, and 4 yr. Dietary energy density was calculated using food but excluding beverages. Intervention participants significantly reduced dietary energy density compared to controls and maintained it over 4 yr — both in cross-sectional (P < 0.0001) and longitudinal (Group x Time interaction, P < 0.0001) analyses. Total energy intake or physical activity did not vary between groups. The intervention group had a small but significant weight loss at 1 yr (Group x Time interaction, P < 0.0001), but no between-group weight difference was observed at 4 yr. Our study showed that reducing dietary energy density did not result in a reduction in total energy intake and suggests that this strategy alone is not sufficient to promote long-term weight loss in a free-living population

Source : Pubmed