Slower Eating Speed Lowers Energy Intake in Normal-Weight but not Overweight/Obese Subjects

Published:January 02, 2014DOI:https://doi.org/10.1016/j.jand.2013.11.002

      Abstract

      Background

      The effect of eating speed on energy intake by weight status is unclear.

      Objective

      To examine whether the effect of eating speed on energy intake is the same in normal-weight and overweight/obese subjects.

      Design

      The effect of slow and fast eating speed on meal energy intake was assessed in a randomized crossover design.

      Participants/setting

      Thirty-five normal-weight (aged 33.3±12.5 years; 14 women and 21 men) subjects and 35 overweight/obese (44.1±13.0 years; 22 women and 13 men) subjects were studied on 2 days during lunch in a metabolic kitchen.

      Intervention

      The subjects consumed the same meal, ad libitum, but at different speeds during the two eating conditions. The weight and energy content of the food consumed was assessed. Perceived hunger and fullness were assessed at specific times using visual analog scales.

      Statistical analyses

      Effect of eating speed on ad libitum energy intake, eating rate (energy intake/meal duration), energy density (energy intake per gram of food and water consumed), and satiety were assessed by mixed-model repeated measures analysis.

      Results

      Meal energy intake was significantly lower in the normal-weight (804.5±438.9 vs 892.6±330.2 kcal; P=0.04) but not the overweight/obese (667.3±304.1 vs 724.8±355.5 kcal; P=0.18) subjects during the slow vs the fast eating condition. Both groups had lower meal energy density (P=0.005 and P=0.001, respectively) and eating rate (P<0.0001 in both groups) during the slow vs the fast eating condition. Both groups reported less hunger (P=0.01 and P=0.03, respectively), and the normal-weight subjects reported more fullness (P=0.02) at 60 minutes after the meal began during the slow compared with the fast eating condition. There was no eating speed by weight status interaction for any of the variables.

      Conclusions

      Eating slowly significantly lowered meal energy intake in the normal-weight but not in the overweight/obese group. It lowered eating rate and energy density in both groups. Eating slowly led to lower hunger ratings in both groups and increased fullness ratings in the normal-weight group at 60 minutes from when the meal began.

      Keywords

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      Biography

      M. Shah is a professor, Department of Kinesiology, Texas Christian University, Fort Worth, TX.

      Biography

      D. Rhea is a professor, Department of Kinesiology, Texas Christian University, Fort Worth, TX.

      Biography

      L. Dart is an associate professor, Department of Nutritional Sciences, Texas Christian University, Fort Worth, TX.

      Biography

      J. Copeland is a nursing student, Texas A&M University, College Station; at the time of the study, she was a graduate student, Department of Kinesiology, Texas Christian University, Fort Worth, TX.

      Biography

      B. Adams-Huet is an assistant professor, Department of Clinical Sciences, University of Texas Southwestern Medical Center at Dallas, TX.

      Biography

      A. James is an exercise physiologist, Cardiology and Interventional Vascular Associates, Dallas, TX; at the time of the study, she was a graduate student, Department of Kinesiology, Texas Christian University, Fort Worth.