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Evaluation of an interactive, Internet-based weight loss program: a pilot study.

Alison O Booth1, Caryl A Nowson, Helen Matters

  • 1The Centre for Physical Activity.utrition, School of Exercise and Nutrition Sciences, Deakin University, 221 Burwood Highway, Burwood, Victoria 3125, Australia. a.booth@qub.ac.uk

Health Education Research
|March 20, 2008
PubMed
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An online weight reduction program combining diet and exercise was not more effective than exercise alone. Both programs increased daily steps, but neither achieved significant weight loss.

Area of Science:

  • Obesity research
  • Digital health interventions
  • Behavioral medicine

Background:

  • Online interventions offer cost-effective consumer reach for health programs.
  • Previous studies show combined diet and exercise are effective for weight loss.
  • The efficacy of online, tailored dietary advice alongside exercise needs further investigation.

Purpose of the Study:

  • To compare the effectiveness of an online dietary advice plus exercise (ED) program versus an exercise-only (EX) program for weight reduction over 12 weeks.
  • To assess weight changes, physical activity levels, and dietary intake in participants randomized to either ED or EX groups.
  • To determine if personalized online dietary goal-setting enhances weight loss outcomes.

Main Methods:

  • Pilot study with 73 participants randomized into ED or EX groups.

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  • Both groups used a website for pedometer data and weekly step goals.
  • The ED group additionally set weekly dietary goals and received email support.
  • Anthropometric measurements and dietary assessments were conducted at a center.

    • Main Results:

    • 53 participants completed the study (26 EX, 27 ED), with a mean BMI of 29.7 kg/m².
    • Weight change was 2.1% in the EX group and 0.9% in the ED group (P=0.15).
    • Both groups increased daily steps equally; only the ED group significantly reduced energy intake.

    Conclusions:

    • Online dietary advice combined with exercise did not yield greater weight loss than exercise alone.
    • While the ED group reduced energy intake, this did not translate to enhanced weight reduction.
    • Personalized online dietary goal-setting may not be sufficient to improve weight loss outcomes when combined with increased physical activity.