An observational study in Resting Metabolic Rate and Energy Metabolism, sponsored by Tel Aviv University. Recruiting at 1 site in Israel. Open to participants aged 18 Years to 65 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-10-08.
Sponsored by Tel Aviv University · Observational
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.
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.
Tel Aviv University is the lead sponsor of 100 studies on the registry; 26 are open to participants now.
Counted across the registry records on this site, refreshed daily.
Healthy adult men and women from the community, aged 18-65 years, who are clinically healthy and able to participate in repeated metabolic measurements under standardized laboratory conditions.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.
Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Corticosteroids (steroids)
Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.
Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
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.
Other: Repeated Measurement of Resting Metabolic Rate
Repeated assessment of resting metabolic rate under standardized conditions; no intervention is administered.
Within-Individual Variability in Resting Metabolic Rate (RMR)
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.
Time frame: 12 weeks
Minimal Detectable Change (MDC) in RMR
The minimal detectable change in resting metabolic rate required to distinguish true physiological change from measurement variability.
Time frame: 12 weeks
Between-Individual Variability in RMR
Assessment of variability in resting metabolic rate between participants based on repeated measurements.
Time frame: 12 weeks
Temporal Trends in RMR
Assessment of systematic changes in resting metabolic rate over time using repeated measurements across the study period.
Time frame: 12 weeks
Plan to share: No
No publications or documents are linked to this record.
Started Jul 2026 (actual). Primary completion is estimated for Dec 2027, 17 months after the start.
How these figures are worked out, and which studies are left out of them.
From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗
Eligibility is decided by the study team. Share this record with your doctor or contact the team directly.
Contact study teamGet an email when the registry record changes — status, dates, results — or when someone posts here.
Sign in to followQuestions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.
Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.
Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.