Within-Individual Variability of Resting Metabolic Rate Over 12 Weeks
Within-Individual Variability of Resting Metabolic Rate Assessed Repeatedly Over 12 Weeks Using Whole-Room Calorimetry
This prospective observational study aims to characterize within-individual variability in resting metabolic rate (RMR) over a 12-week period using high-frequency repeated measurements under standardized conditions. Participants will undergo RMR assessments three times per week using whole-room indirect calorimetry.
The study will quantify the magnitude of physiological variability in RMR, distinguish true biological variation from measurement error, and estimate the minimal detectable change required to identify meaningful metabolic adaptations.
Studie Overzicht
Toestand
Conditie
Interventie / Behandeling
Gedetailleerde beschrijving
Resting metabolic rate (RMR) is a major component of total daily energy expenditure and is widely used in metabolic research. However, most studies rely on single or infrequent measurements, assuming RMR is stable within individuals.
Emerging evidence suggests that RMR exhibits measurable within-individual variability, but the temporal structure and magnitude of this variability remain poorly characterized.
This study will implement a high-frequency repeated-measures design, with RMR measured three times per week over 12 weeks using whole-room indirect calorimetry under standardized conditions. This approach will allow detailed characterization of short-term variability and provide estimates for within-subject variability, measurement error, and minimal detectable change.
The findings will inform interpretation of longitudinal metabolic studies and improve study design in future research.
Studietype
Inschrijving (Geschat)
Contacten en locaties
Studiecontact
- Naam: Yftach Prof. Gepner
- Telefoonnummer: +972 50-682-8501
- E-mail: gepner@tauex.tau.ac.il
Studie Contact Back-up
- Naam: Lien Bruck
- Telefoonnummer: +972 587487431
Deelname Criteria
Geschiktheidscriteria
Leeftijden die in aanmerking komen voor studie
- Volwassen
- Oudere volwassene
Accepteert gezonde vrijwilligers
Bemonsteringsmethode
Studie Bevolking
Beschrijving
Inclusion Criteria:
- Adults aged 18-65 years
- Clinically healthy individuals
- Stable body weight (±2 kg) over the past 3 months
- Ability and willingness to attend morning measurements three times per week for 12 weeks
- Ability to provide informed consent
Exclusion Criteria:
- Known uncontrolled endocrine or metabolic disease
- Use of medications known to significantly affect resting metabolic rate (e.g., systemic corticosteroids, unstable thyroid hormone therapy)
- Acute illness within 14 days prior to enrollment
- Pregnancy or lactation
- Any medical condition that, in the opinion of the investigators, may interfere with safe participation
Studie plan
Hoe is de studie opgezet?
Ontwerpdetails
Cohorten en interventies
Groep / Cohort |
Interventie / Behandeling |
|---|---|
|
Healthy Adults
Healthy adult participants undergoing repeated measurements of resting metabolic rate (RMR) three times per week over a 12-week period under standardized conditions.
No intervention is applied.
|
Repeated assessment of resting metabolic rate under standardized conditions; no intervention is administered.
|
Wat meet het onderzoek?
Primaire uitkomstmaten
Uitkomstmaat |
Maatregel Beschrijving |
Tijdsspanne |
|---|---|---|
|
Within-Individual Variability in Resting Metabolic Rate (RMR)
Tijdsspanne: 12 weeks
|
Within-individual variability in resting metabolic rate (RMR) assessed using repeated measurements under standardized conditions.
Variability will be quantified using mean, standard deviation (SD), and coefficient of variation (CV%) across repeated measurements.
|
12 weeks
|
Secundaire uitkomstmaten
Uitkomstmaat |
Maatregel Beschrijving |
Tijdsspanne |
|---|---|---|
|
Minimal Detectable Change (MDC) in RMR
Tijdsspanne: 12 weeks
|
The minimal detectable change in resting metabolic rate required to distinguish true physiological change from measurement variability.
|
12 weeks
|
|
Between-Individual Variability in RMR
Tijdsspanne: 12 weeks
|
Assessment of variability in resting metabolic rate between participants based on repeated measurements.
|
12 weeks
|
|
Temporal Trends in RMR
Tijdsspanne: 12 weeks
|
Assessment of systematic changes in resting metabolic rate over time using repeated measurements across the study period.
|
12 weeks
|
Medewerkers en onderzoekers
Sponsor
Onderzoekers
- Hoofdonderzoeker: Yftach Prof. Gepner, Tel Aviv University
Studie record data
Bestudeer belangrijke data
Studie start (Geschat)
Primaire voltooiing (Geschat)
Studie voltooiing (Geschat)
Studieregistratiedata
Eerst ingediend
Eerst ingediend dat voldeed aan de QC-criteria
Eerst geplaatst (Werkelijk)
Updates van studierecords
Laatste update geplaatst (Werkelijk)
Laatste update ingediend die voldeed aan QC-criteria
Laatst geverifieerd
Meer informatie
Termen gerelateerd aan deze studie
Andere studie-ID-nummers
- 0012137-2
Plan Individuele Deelnemersgegevens (IPD)
Bent u van plan om gegevens van individuele deelnemers (IPD) te delen?
Informatie over medicijnen en apparaten, studiedocumenten
Bestudeert een door de Amerikaanse FDA gereguleerd geneesmiddel
Bestudeert een door de Amerikaanse FDA gereguleerd apparaatproduct
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