Substrate Oxidation in Children in Response to High and Low Dairy Intake

Not Applicable

Completed

• Conditions: Childhood Obesity
• Interventions: Dietary Supplement: Dairy Servings; Dietary Supplement: Dairy Products

• Registration Number: NCT01664702
• Lead Sponsor: University of Kansas

Brief Summary

The investigators propose a randomized trial comparing higher levels of dairy intake compared to lower levels of dairy intake. Participants will be 20 boys and girls, age 10-13, overweight (\>85%) who are currently consuming 1 or fewer servings of dairy per day. Each participant will be randomized to either higher or lower levels of dairy intake. A baseline calorimeter stay will determine 24-hour energy needs. Participants will then receive the diet they have been randomized to receive for 6 days and will then have a second calorimeter stay. During this 2nd stay, each participant will continue to receive the diet they were randomized to receive and will achieve a 300 kcal energy deficit through physical activity. The investigators hypothesize that children who receive a 300 kcal energy deficit from the energy expenditure of exercise and receive 3 to 4 servings of dairy products will show greater increases in fat oxidation compared to children who receive a 300 kcal energy expenditure of exercise and receive 1 or fewer servings of dairy products.

Detailed Description

The study objective was to conduct a randomized clinical trial comparing enhanced levels of dairy consumption to lower levels of dairy consumption during an energy deficit resulting from 300 kcal of exercise. Participants were 24 sedentary and overweight boys, 13-15 years of age and girls, 12 to 14 years of age, and consuming 1 or fewer servings of dairy and less than 600 mg calcium per day at baseline. Participants were randomly assigned to either higher or lower dairy for 6 days and then crossed over to the opposite treatment subsequent to 2 weeks of wash out. The investigators provided all meals and snacks for the participants during the higher and lower dairy conditions. During the wash out period, participants were instructed to consume their normal diet as assessed at baseline which consisted of 1 or fewer servings of dairy and less than 600 mg calcium. Participants stayed in the calorimeter at baseline, day 7, and day 28 (end of study), after crossover. The calorimeter measured substrate oxidation under the condition of a 300 kcal energy deficit due to exercise.

Study Timeline

• Study Start: 2005-01
• Primary Completion: 2005-12
• Study Completion: 2005-12
• Status Verified: 2012-08
• Study First Submitted: 2012-08-10
• Study First Submitted QC: 2012-08-13
• Last Update Submitted: 2012-08-13
• Study First Posted: 2012-08-14
• Last Update Posted: 2012-08-14

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 24

Inclusion Criteria

• Must be overweight
• and 10-13 years old
• currently consuming 1 or fewer servings of dairy
• less than 600 mg calcium per day

Exclusion Criteria

• not meeting the above criteria
• must be present for duration of the study

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: CROSSOVER

Arm && Interventions

Group	Intervention	Description
Low dairy diet	Dairy Servings	One or fewer dairy servings per day
Recommended dairy diet	Dairy Products	Recommended servings of dairy products per day

Primary Outcome Measures

Name	Time	Method
24hr fat oxidation	24 hrs	Fat oxidation over a 24 hr period will be measured using whole room indirect calorimetry.

Secondary Outcome Measures

Name	Time	Method
24hr energy expenditure	baseline, 7 days after each diet	Energy Expenditure over a 24 hr period will be measured using whole room indirect calorimetry.

Trial Locations

Locations (1)

Energy Balance Lab, The University of Kansas; 🇺🇸 Lawrence, Kansas, United States