Pediatric Obesity
Conditions
Keywords
appetite control, obesity, Adolescents, Physical activity
Brief summary
The aim of the present study is to compare the effect of two weight loss interventions inducing the same energy deficit but one based on exercise and one using dietary restriction, on appetite control in obese adolescents. Investigator hypothesis that daily energy intake and hunger will be increased in the dietary restriction group but not in response to the exercise program.
Detailed description
The present study will compare the nutritional responses to two 4-month weight loss programs inducing the same energy deficit in obese adolescents, one based on exercise and the other one using dietary restriction. After a first 4-month phase stabilizing the adolescents' daily energy intake and expenditure, half of the sample with increase their physical activity to induce a 10% increase of their daily energy expenditure (maintaining the same energy intake) while the other half will stick with the same physical activity program but reduce their daily intake to match for the same 10% energy deficit. Before, at the end and 4 months after the intervention, Investigator will assess the adolescents' energy intake and appetite control by measuring: ad libitum energy intake, appetite feelings throughout the day, food preferences, food reward. But also all the potential underneath mechanisms based on gastro-peptides and adipokines. Finally, sleep metabolism will be assessed using polysomnography as a potential link between weight loss and appetite control. Body composition, quality of life, aerobic capacities and resting metabolic rate will also be measured at each time point.
Interventions
BEHAVIORALDEF-EX : Exercise induced energy deficit
DEF-EX : Exercise induced energy deficit While their intake will remain the same as phase 1, they will increase their physical activity energy expenditure by 10% thanks to an increase of their prescribed exercise intensities or durations.
BEHAVIORALDEF-EI : Energy restriction induced energy deficit
DEF-EI : Energy restriction induced energy deficit The content of their energy intake will be decreased by 10% daily compared with the phase one of the protocol (stabilization of intake). This decrease will be allowed by the internship nature of the clinical program; all the meals are prepared and served by the personal of the clinical centre.
Sponsors
Tza Nou - Maison médicale pour enfants et adolescentes - 230, rue Vercingétorix - B.P. 77 - 63150 La Bourboule
SSR Nutrition-Obésité - 33-35 rue Maréchal Leclerc - 63000 Clermont-Ferrand
Laboratoire AME2P. Campus universitaire des cezeaux, 63170 Aubiere, Cedex
University Hospital, Clermont-Ferrand
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
DOUBLE (Subject, Caregiver)
Eligibility
Sex/Gender
ALL
Age
12 Years to 16 Years
Healthy volunteers
No
Inclusion criteria
* BMI percentile \> 97th percentile according to the french curves. * ages 12-16 years old * Signed consent form * being registered in the national social security system * no contraindication to physical activity
Exclusion criteria
* Previous surgical interventions that is considered as non-compatible with the study. * Diabetes * weight loss during the last 6 months * cardiovascular disease or risks
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Changes in energy intake at lunch time | Before, after 10 months and 4 month after the intervention | food intake will be measured ad libitum during a lunch time buffet. The adolescents will be offered an ad libitum buffet-type meal composed based on their food intake preferences. Their intake will be assessed by a member of the investigation team |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Aerobic capacity | Before, after 10 months and 4 month after the intervention | VO2peak will be measured during a graded exhaustive cycling test performed by a specialized medical investigator from the Department of Sports Medicine, Functional and Respiratory Rehabilitation (Clermont-Ferrand University Hospital). The initial power will be set at 30 W for three minutes and followed by 15 W increments every 1.5 minutes. |
| Insulin concentration | Before, after 10 months and 4 month after the intervention | : Insulin will be assessed thanks to a fasting blood sample taken by a specialized nurse. |
| Glycaemia concentration | Before, after 10 months and 4 month after the intervention | glycaemia, will be assessed thanks to a fasting blood sample taken by a specialized nurse. |
| total cholesterol concentration | Before, after 10 months and 4 month after the intervention. | cholesterol total will be assessed thanks to a fasting blood sample taken by a specialized nurse. |
| HDL-C concentration | Before, after 10 months and 4 month after the intervention | HDL-C will be assessed thanks to a fasting blood sample taken by a specialized nurse |
| LDL-C concentration | Before, after 10 months and 4 month after the intervention | LDL-C will be assessed thanks to a fasting blood sample taken by a specialized nurse. |
| change in FM | Before, after 10 months and 4 month after the intervention | Fat mass (FM) was assessed using DXA following standardized procedures |
| Acylated Ghrelin concentration | Before, after 10 months and 4 month after the intervention | Acylated Ghrelin concentration will be assessed thanks to a fasting blood sample taken by a specialized nurse |
| Leptin concentration | Before, after 10 months and 4 month after the intervention | Leptin concentration will be assessed thanks to a fasting blood sample taken by a specialized nurse |
| Sleep metabolism | Before, after 10 months and 4 month after the intervention | sleep duration will be assessed during an overnight polysomnography. |
| appetite feelings | Before, after 10 months and 4 month after the intervention | hunger satiety will be assessed using visual analogue scale at regular interval through a test day |
| Quality of life Score | Before, after 10 months and 4 month after the intervention | A total Quality of life score will be obtain thanks to the SF36 questionnaire. This is a self-reported questionnaire. A member of the investigation team will be present to help and guide the adolescents if needed |
| Health Perception | Before, after 10 months and 4 month after the intervention | A total Health Perception score will be obtain thanks to the Health Perception Questionnaire . This is a self-reported questionnaire. A member of the investigation team will be present to help and guide the adolescents if needed. |
| Triglycerides concentration | Before, after 10 months and 4 month after the intervention | Triglycerides concentration will be assessed thanks to a fasting blood sample taken by a specialized nurse. |
Countries
France
Contacts
Primary ContactPatrick LACARIN
Outcome results
None listed