Effects of two weeks' mandatory snack consumption on energy intake and energy balance

Stephen Whybrow, Claus Mayer, Terry R Kirk, Nik Mazlan, R. James Stubbs

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

Objective: Our goal was to compare the effects of mandatory consumption of commercial snack products (CSPs) on energy intakes and energy balance in free-living adults and to assess the interaction between habitual level of CSP consumption and the interventions.

Research Methods and Procedures: Four groups of 18 subjects (lean and overweight, males and females) were studied using a crossover design. Subjects consumed one type of CSP (high-carbohydrate, high-fat, or mixed composition) at three manipulations of energy 0 MJ (control), 1.5 MJ (low-energy), and 3.0 MJ (high-energy) each day during three 14-day interventions. The study design was parallel for type of CSP (macronutrient composition) and within-subjects for energy level. Subjects self-recorded food intakes between Days 8 and 14, and body weights were investigator-recorded on Days 1, 8, and 15 of each intervention period. Daily energy expenditure was estimated by heart rate monitoring.

Results: Daily energy intakes increased from 10.4 MJ (control) to 11.1 MJ (low-energy) and 11.5 MJ (high-energy) (p < 0.001), resulting in a trend (not significant) for body weight gain. Energy balance was more positive when subjects were not recording their food intakes than when they were (p < 0.001). There was a trend (not significant) for greater increases in energy intake with increasing fat content, and energy density, of the interventions. Frequent CSP consumers compensated more for the interventions than did infrequent CSP consumers (R2 = 0.125, p = 0.003).

Discussion: Subjects partially compensated for energy when supplemented with CSPs over 14-day periods, although this was insufficient to prevent some increase in energy balance. The level of compensation correlated with habitual energy intake from CSPs.
Original languageEnglish
Pages (from-to)673-685
Number of pages13
JournalObesity
Volume15
Issue number3
DOIs
Publication statusPublished - Mar 2007

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Snacks
Energy Intake
Eating
Fats
Body Weight
Cross-Over Studies
Energy Metabolism
Weight Gain
Heart Rate
Carbohydrates
Research Personnel

Keywords

  • Adult
  • Body Weight
  • Energy Intake
  • Energy Metabolism
  • Feeding Behavior
  • Female
  • Food Habits
  • Homeostasis
  • Humans
  • Male
  • Middle Aged
  • Patient Compliance
  • Weight Loss

Cite this

Effects of two weeks' mandatory snack consumption on energy intake and energy balance. / Whybrow, Stephen; Mayer, Claus; Kirk, Terry R; Mazlan, Nik; Stubbs, R. James.

In: Obesity, Vol. 15, No. 3, 03.2007, p. 673-685.

Research output: Contribution to journalArticle

Whybrow, Stephen ; Mayer, Claus ; Kirk, Terry R ; Mazlan, Nik ; Stubbs, R. James. / Effects of two weeks' mandatory snack consumption on energy intake and energy balance. In: Obesity. 2007 ; Vol. 15, No. 3. pp. 673-685.
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N2 - Objective: Our goal was to compare the effects of mandatory consumption of commercial snack products (CSPs) on energy intakes and energy balance in free-living adults and to assess the interaction between habitual level of CSP consumption and the interventions.Research Methods and Procedures: Four groups of 18 subjects (lean and overweight, males and females) were studied using a crossover design. Subjects consumed one type of CSP (high-carbohydrate, high-fat, or mixed composition) at three manipulations of energy 0 MJ (control), 1.5 MJ (low-energy), and 3.0 MJ (high-energy) each day during three 14-day interventions. The study design was parallel for type of CSP (macronutrient composition) and within-subjects for energy level. Subjects self-recorded food intakes between Days 8 and 14, and body weights were investigator-recorded on Days 1, 8, and 15 of each intervention period. Daily energy expenditure was estimated by heart rate monitoring.Results: Daily energy intakes increased from 10.4 MJ (control) to 11.1 MJ (low-energy) and 11.5 MJ (high-energy) (p < 0.001), resulting in a trend (not significant) for body weight gain. Energy balance was more positive when subjects were not recording their food intakes than when they were (p < 0.001). There was a trend (not significant) for greater increases in energy intake with increasing fat content, and energy density, of the interventions. Frequent CSP consumers compensated more for the interventions than did infrequent CSP consumers (R2 = 0.125, p = 0.003).Discussion: Subjects partially compensated for energy when supplemented with CSPs over 14-day periods, although this was insufficient to prevent some increase in energy balance. The level of compensation correlated with habitual energy intake from CSPs.

AB - Objective: Our goal was to compare the effects of mandatory consumption of commercial snack products (CSPs) on energy intakes and energy balance in free-living adults and to assess the interaction between habitual level of CSP consumption and the interventions.Research Methods and Procedures: Four groups of 18 subjects (lean and overweight, males and females) were studied using a crossover design. Subjects consumed one type of CSP (high-carbohydrate, high-fat, or mixed composition) at three manipulations of energy 0 MJ (control), 1.5 MJ (low-energy), and 3.0 MJ (high-energy) each day during three 14-day interventions. The study design was parallel for type of CSP (macronutrient composition) and within-subjects for energy level. Subjects self-recorded food intakes between Days 8 and 14, and body weights were investigator-recorded on Days 1, 8, and 15 of each intervention period. Daily energy expenditure was estimated by heart rate monitoring.Results: Daily energy intakes increased from 10.4 MJ (control) to 11.1 MJ (low-energy) and 11.5 MJ (high-energy) (p < 0.001), resulting in a trend (not significant) for body weight gain. Energy balance was more positive when subjects were not recording their food intakes than when they were (p < 0.001). There was a trend (not significant) for greater increases in energy intake with increasing fat content, and energy density, of the interventions. Frequent CSP consumers compensated more for the interventions than did infrequent CSP consumers (R2 = 0.125, p = 0.003).Discussion: Subjects partially compensated for energy when supplemented with CSPs over 14-day periods, although this was insufficient to prevent some increase in energy balance. The level of compensation correlated with habitual energy intake from CSPs.

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KW - Energy Metabolism

KW - Feeding Behavior

KW - Female

KW - Food Habits

KW - Homeostasis

KW - Humans

KW - Male

KW - Middle Aged

KW - Patient Compliance

KW - Weight Loss

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DO - 10.1038/oby.2007.567

M3 - Article

VL - 15

SP - 673

EP - 685

JO - Obesity

JF - Obesity

SN - 1930-7381

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ER -