Energy Expenditure and Substrate Utilization During Acute Under- and Over-feeding
Studieoversigt
Status
Status
Betingelser
Betingelser
Intervention / Behandling
Intervention / Behandling
Detaljeret beskrivelse
Undersøgelsestype
Undersøgelsestype
Tilmelding (Faktiske)
Tilmelding
Fase
Fase
- Ikke anvendelig
Kontakter og lokationer
Studiesteder
-
-
North Carolina
-
Kannapolis, North Carolina, Forenede Stater, 28081
- UNC Chapel Hill Nutrition Research Institute
-
-
Deltagelseskriterier
Berettigelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
Tager imod sunde frivillige
Køn, der er berettiget til at studere
Beskrivelse
Inclusion Criteria:
- Woman
- Postmenopausal
- Aged 50-65 years
- BMI 25-35kg/m2
- Not taking blood pressure or anti-inflammatory medications or any other medications that may impact the results
- Thyroid hormone profile within the normal reference range
- No medical condition which may impact the results (e.g. diabetes)
- Accustomed to eating regular meals including breakfast
Exclusion Criteria:
- Smoker
- Heavy exerciser (defined as >150 minutes/week for more than 3 months)
- Abuses alcohol or drugs
- Vegetarian
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: Grundvidenskab
- Tildeling: Randomiseret
- Interventionel model: Crossover opgave
- Maskning: Ingen (Åben etiket)
Antal våben
Våben og indgreb
Deltagergruppe / ArmDeltagergruppe / Arm |
Intervention / BehandlingIntervention / Behandling |
|---|---|
|
Eksperimentel: Eucaloric Feeding
Subjects will complete an initial eucaloric feeding study day.
During this study day, subjects will receive 100% of their calorie requirements.
24-hour energy expenditure will be measured.
|
To assess 24-hour energy expenditure and substrate utilization subjects will spend 23 hours and 15 minutes each day in the metabolic chamber at the UNC NRI.
Subjects will be requested to arrive at the study center each morning following a 10hour overnight fast.
During each study day, subjects remained sedentary.
All meals were provided and were tailored to each subject's specific energy requirements and the study protocol (i.e.
50% or 150% of calorie requirements).
|
|
Eksperimentel: Underfeeding
Following the eucaloric feeding study day, subjects will undergo the underfeeding and overfeeding arms in random order.
During the underfeeding study arm, subjects will receive 50% of their calorie requirements (as determined during the initial eucaloric study day) for 3 days.
24-hour energy expenditure will be measured.
|
To assess 24-hour energy expenditure and substrate utilization subjects will spend 23 hours and 15 minutes each day in the metabolic chamber at the UNC NRI.
Subjects will be requested to arrive at the study center each morning following a 10hour overnight fast.
During each study day, subjects remained sedentary.
All meals were provided and were tailored to each subject's specific energy requirements and the study protocol (i.e.
50% or 150% of calorie requirements).
|
|
Eksperimentel: Overfeeding
Following the eucaloric feeding study day, subjects will undergo the underfeeding and overfeeding arms in random order.
During the overfeeding study arm, subjects will receive 150% of their calorie requirements (as determined during the initial eucaloric study day) for 3 days.
24-hour energy expenditure will be measured.
|
To assess 24-hour energy expenditure and substrate utilization subjects will spend 23 hours and 15 minutes each day in the metabolic chamber at the UNC NRI.
Subjects will be requested to arrive at the study center each morning following a 10hour overnight fast.
During each study day, subjects remained sedentary.
All meals were provided and were tailored to each subject's specific energy requirements and the study protocol (i.e.
50% or 150% of calorie requirements).
|
Hvad måler undersøgelsen?
Primære resultatmål
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
|
Energy Expenditure
Tidsramme: 24-hour energy expenditure will be assessed
|
24-hour energy expenditure will be assessed using the metabolic chamber at UNC NRI.
Energy expenditure will be measured during eucaloric feeding (subjects will receive 100% of calorie requirements), as well as during 24, 48 and 72 hours of under and overfeeding.
|
24-hour energy expenditure will be assessed
|
Sekundære resultatmål
Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
|
Whole blood transcriptomics
Tidsramme: Fasting a.m. sample, before lunch, and at 0.5, 2, and 4.5 hours post lunch
|
RNA will be extracted from whole blood.
Transcriptomic profile will be assessed by microarray
|
Fasting a.m. sample, before lunch, and at 0.5, 2, and 4.5 hours post lunch
|
|
Plasma metabolomics
Tidsramme: Fasting a.m. sample, before lunch, and at 0.5, 2, and 4.5 hours post lunch
|
Plasma metabolomic profile will be assessed using GC/MS and LC/MS platforms.
|
Fasting a.m. sample, before lunch, and at 0.5, 2, and 4.5 hours post lunch
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Samarbejdspartnere og efterforskere
Sponsor
Sponsor
Efterforskere
Efterforskere
- Ledende efterforsker: Andrew G Swick, PhD, UNC Chapel Hill Nutrition Research Institute
Datoer for undersøgelser
Studer store datoer
Studiestart
Studiestart
Primær færdiggørelse (Faktiske)
Primær færdiggørelse
Studieafslutning (Faktiske)
Studieafslutning
Datoer for studieregistrering
Først indsendt
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først indsendt, der opfyldte QC-kriterier
Først opslået (Skøn)
Først opslået
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Skøn)
Sidste opdatering sendt
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Andre undersøgelses-id-numre
Andre undersøgelses-id-numre
- 12-0681
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