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WalkMore: a randomized controlled trial of pedometer-based interventions differing on intensity messages.

Catrine Tudor-Locke1, Damon L Swift, John M Schuna

  • 1Pennington Biomedical Research Center, 6400 Perkins Road, Baton Rouge, Louisiana 70808, USA. Tudor-Locke@pbrc.edu.

BMC Public Health
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PubMed
Summary

This study investigated whether increasing walking intensity alongside daily steps improves blood pressure in postmenopausal women. Findings will inform targeted physical activity interventions for cardiovascular disease prevention.

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Area of Science:

  • Cardiovascular Health
  • Exercise Physiology
  • Public Health

Background:

  • Sedentary postmenopausal women are at high risk for cardiovascular disease.
  • Pedometer programs improve blood pressure but often neglect walking intensity.
  • New pedometers track both steps and moderate-intensity activity duration.

Purpose of the Study:

  • To compare the effects of two pedometer-based walking interventions on blood pressure in sedentary postmenopausal women.
  • To determine if adding a moderate-intensity walking goal enhances blood pressure benefits compared to increasing steps alone.
  • To present the rationale, design, and protocols for the WalkMore randomized controlled trial.

Main Methods:

  • A 3-arm, 3-month blinded randomized controlled trial involving 120 sedentary/low active postmenopausal women (45-74 years).
  • Group A (BASIC): 10,000 steps/day.
  • Group B (ENHANCED): 10,000 steps/day and 30 minutes of moderate-intensity walking (≥100 steps/min).
  • Group C (Control): No intervention.

Main Results:

  • The primary outcome is systolic blood pressure.
  • Secondary outcomes include diastolic blood pressure, anthropometric measurements, metabolic markers, and physical activity levels.
  • The study rigorously controls and quantifies pedometer-based physical activity interventions.

Conclusions:

  • This trial will elucidate the distinct and combined benefits of walking volume and intensity on blood pressure.
  • Results will inform evidence-based recommendations for physical activity interventions in at-risk populations.
  • Understanding these relationships is crucial for cardiovascular disease prevention strategies.