Telephone Physical Activity Intervention in Obese Youth


The purpose of this study is to examine the effectiveness of a telephone-based physical activity (PA) intervention in obese adolescents attending a Health Weight Comprehensive Clinic. Secondary aims focus on increasing the amount of change in obesity markers, namely waist circumference and BMI z-scores. The investigators hypothesize the following: 1.The telephone-based PA intervention will increase PA levels above the mail group; and 2. The telephone-based PA intervention will provide changes in waist circumference and BMI z-scores above the mail group.

Full Title of Study: “Telephone-Based Physical Activity Intervention in Obese Youth”

Study Type

  • Study Type: Interventional
  • Study Design
    • Allocation: Randomized
    • Intervention Model: Parallel Assignment
    • Primary Purpose: Treatment
    • Masking: None (Open Label)
  • Study Primary Completion Date: October 2011

Detailed Description

Obesity rates in youth have tripled over the past 20 years. Physical activity aids in weight loss and is critical for weight maintenance. Further, physical activity has other physiological and psychological benefits. Obese youth often see specialists for weight loss treatment. Treatment in a pediatric population uses a multi-component approach, but physical activity if often overlooked. Combining physical activity information with physician care and nutritional information could improve weight loss and the overall health of these obese children.


  • Behavioral: physical activity
    • physical activity counseling sessions will occur by telephone weekly for 2 months

Arms, Groups and Cohorts

  • Experimental: Physical Activity
    • Participants will receive 7 weeks of weekly news letters and phone calls. The news letters and phone calls will include information about physical activity and ways to increase physical activity levels. This is in addition the standard medical care.
  • No Intervention: Standard Medical Care
    • Participants will receive standard medical care

Clinical Trial Outcome Measures

Primary Measures

  • physical activity
    • Time Frame: 4 months
    • physical activity levels during the 2 month intervnetion will be measured and then physical activity will also be measured during a 2 month follow up period

Secondary Measures

  • BMI
    • Time Frame: 4 months
    • waist circumference and weight and height will be measured. BMI will be calculated. After the 2 month intervention period the amount of change in waist circumference and BMI will be quantified. These measures will also be examined after a 2 month follow up period

Participating in This Clinical Trial

Inclusion Criteria

  • 12 to 18 years old – attending the ECU Pediatric Comprehensive Healthy Weight Clinic Exclusion Criteria:

  • must be able to read and write in English – must be able to participate in physical activity

Gender Eligibility: All

Minimum Age: 12 Years

Maximum Age: 18 Years

Are Healthy Volunteers Accepted: Accepts Healthy Volunteers

Investigator Details

  • Lead Sponsor
    • East Carolina University
  • Provider of Information About this Clinical Study
    • Principal Investigator: Katrina D DuBose, Associate Professor – East Carolina University
  • Overall Official(s)
    • Katrina D DuBose, PhD, Principal Investigator, East Carolina University
    • David Collier, MD, PhD, Study Chair, East Carolina University
    • Lesley Lutes, PhD, Study Chair, East Carolina University
    • Amy Gross-McMillan, PT, PhD, Study Chair, East Carolina University

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