Pediatric Obesity
Conditions
Keywords
energy expenditure, weight loss, obesity, adolescents
Brief summary
While interdisciplinary weight loss intervention have been shown successful among adolescents with obesity, a weight regain is most of the time observed within the following weeks or months. The aim of the present project will be to better identify the independent role played by both the metabolic and mechanical load and their modification during weight loss, on the energy expenditure and energy metabolism of adolescents with obesity.
Detailed description
A total of 28 adolescents with obesity will be recruited from our local inpatient pediatric obesity centers. Before their weight loss intervention the adolescents will complete two experimental visits. During the first visit, anthropometric and body composition measurements will be performed. Then the participants will be asked to complete a walking exercise on a treadmill during the second visit. Their energy expenditure and substrate oxidation will be assessed by indirect calorimetry. They will have to walk at 5 different walking speeds. Then, they will follow a 12-week weight loss intervention. By the end of this intervention, their body composition will be assessed and they will be asked to perform the same walking exercise. On a separate occasion (randomly assigned) they will have to repeat this walking exercise while carrying a load corresponding of their weight loss.
Interventions
BEHAVIORALMultidisciplinary weight loss
The adolescents will follow a 12-week intervention combining nutritional education, physical activity 3 times per week and psychological supports.
Sponsors
University Hospital, Clermont-Ferrand
Study design
Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
BASIC_SCIENCE
Masking
NONE
Masking description
There is no need for masking here.
Intervention model description
One group of adolescents with obesity
Eligibility
Sex/Gender
ALL
Age
12 Years to 16 Years
Healthy volunteers
No
Inclusion criteria
* being aged 12-16 years old * no contraindication to physical exercise * no cardiovascular disease * BMI above the 97th percentile * candidate to a weight loss intervention
Exclusion criteria
* surgery and medical conditions preventing them to perform the intervention * Weight loss during the previous 6 months * medication that could interfere with energy metabolism. * pregnancy * regular tobacco and alcool use
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Change in Energy Expenditure between before and after weight loss | before and after the 12-week weight loss | amount of energy expended during the walking tests, measured using indirect calorimetry |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| change in lipid oxidation between before and after weight loss | before and after the 12-week weight loss | amount of lipids oxidized during the walking tests, measured using indirect calorimetry |
| change in Fat mass between before and after weight loss | before and after the 12-week weight loss | The amount of body fat will be assessed by dual energy X-ray absorptiometry |
| change physical activity preferences between before and after weight loss | before and after the 12-week weight loss intervention | Children will be asked to indicate their prefered physical activties and sedenatry behaviors on a computer task using visual analog scale (from 0 to 150 mm) |
| Change in Energy Expenditure between the unloaded and loaded walking test | after the 12_week weight loss | amount of energy expended during the walking tests, measured using indirect calorimetry |
| Change in lipid oxidation between the unloaded and loaded walking test | after the 12_week weight loss | amount of lipids oxidized during the walking tests, measured using indirect calorimetry |
Countries
France
Contacts
PRINCIPAL_INVESTIGATORYves Boirie
University Hospital, Clermont-Ferrand
Outcome results
None listed