Energy Intake, Exercise and Constitutional Leanness
Energy Intake, Exercise and Constitutional Leanness
The aim of this study will be to identify the physical and dietary profile of adult women
 presenting constitutional leanness (CL), comparatively with normal-weight peers and
 BMI-matched women with anorexia nervosa. After an evaluation of their daily energy intake,
 physical activity level, body composition, aerobic capacities and muscle strength, women from
 the normal weight and CL groups will be asked to realized laboratory sessions to evaluate
 their energy intake and appetite feelings responses to acute exercise
Body composition (using X-ray absorptiometry), muscle strength (biodex), daily energy intake
 (dietary record), food preferences (Leeds Food Preference Questionnaire) and physical
 activity level (GT3X accelerometers) will be assessed among women with constitutional
 leanness normal weight women and women with anorexia nervosa. The CT and NW groups will then
 be asked to randomly realized three experimental session: i) a rest session with an fixed
 lunch meal; a rest session with an ad libitum meal ; iii) an exercise session with an ad
 libitum meal. Their ad libitum energy intake will be assessed during the two last sessions.
 Appetite feelings will be assessed at regular intervals and their food reward in response to
 the lunch will also be assessed.
Inclusion Criteria:

 -  Common criteria to the three groups

 -  Women

 -  Aged 18 to 35 years old

 -- Signed consent form

 -  being registered in the national social security system

 -  no contraindication to physical activity

 Criteria specific to constitutionally lean women

 -  BMI ≤ 17.5 kg/m2

 -  Weight stable for the last three months

 -  No dietary disorders

 -  no sign of denutrition

 -  absence of amenorrhea

 Criteria specific to women with anorexia nervosa

 -  BMI ≤ 17.5 kg/m2

 -  Pure restrictive Anorxia nevrosa: no binge eating or vomiting episodes for the last
 thress months.

 -  DSM V (2013) crietria Criteria specific to normal weight women

 -  20 kg/m2 ≤ BMI ≤ 25 kg/m2

 -  Weight stable for the last three months

 -  No dietary disorders

 -  no sign of denutrition

 -  absence of amenorrhea

 Exclusion Criteria:

 -  Pregnancy

 -  Intensive physical activity level (aboce 3 sessions per week)

 -  Impaired level of IGF-1, estradiol, T3free, cortisol and leptin (for normal weight and
 constitutionally lean women)

 -  Previous surgical interventions that is considered as non-compatible with the study.

 -  Diabetes

 -  Medication that could interfer with the study.

 -  cardiovascular disease or risks

 -  Surgery within the last 3 months