Energy Intake, Exercise and Constitutional Leanness

University Hospital, Clermont-Ferrand34 enrolled

Overview

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.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

NONE

Enrollment

Conditions

Anorexia Nervosa Constitutional Leanness

Interventions

REST-FixedBEHAVIORAL

condition without exercise / rest condition. The participants will be asked to remain quiet and at rest during the morning and will receive a fixed meal at lunch. Their food reward will be assessed before and after lunch. Their appetite feelings will be assessed at regular intervals.

REST-AdLibBEHAVIORAL

condition without exercise / rest condition. The participants will be asked to remain quiet and at rest during the morning and will receive an ad libitum meal at lunch. Their food reward will be assessed before and after lunch. Their appetite feelings will be assessed at regular intervals.

EX-AdLibBEHAVIORAL

condition with an acute exercise set 30 minutes before the lunch meal that will be served ad libitum This will be a 30-minute exercise set at 65% of their capacities (cycling), 30 minutes before lunch.

Eligibility

Sex: FEMALEMin age: 18 YearsMax age: 35 YearsHealthy volunteers:

Medical Language ↔ Plain English

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

Locations (1)

Chu Clermont Ferrand

Clermont-Ferrand, France

Outcomes

Primary Outcomes

Change in energy intake measured during the ad libitum buffet meal (in kcal).

food intake will be measured ad libitum during a lunch buffet. The participants will be offered an ad libitum buffet-type meal composed based on their food intake preferences. Their intake will be weighted using an electronic food scale by a member of the investigation team and then analysed using Bilnuts software.

Time frame: day 1 , day 8

Secondary Outcomes

Body fat mass

the percentage of body fat and the quantity of fat mass will be assessed using X-ray absorptiometry (DXA)

Time frame: day 1

fat free mass

the percentage of body fat and the quantity of fat mass will be assessed using X-ray absorptiometry (DXA)

Time frame: day 1

Physical activity level

The time spent at low-moderate and vigorous physical activity will be assessed using a 7-day accelerometry record (Actigraph GT3X)

Time frame: day 1

Daily energy intake

The amount and quality of food intake will be assessed using a three-day dietary record

Time frame: Trough 3 days

Food reward

The participants will be asked to complete a validated computer-based procedure to measure food reward (Leeds Food Preference Questionnaire; LFPQ)

Time frame: day 1 , day 8 , day 15

change in energy intake measured during the ad libitum buffet meal (in kcal).

Data from ClinicalTrials.gov

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