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Go to CalR, a web application for indirect calorimetry analysis. The CalR project: There is a critical lack of standardization for indirect calorimetry experiments to measure body composition ( Corrigan et al eLife 2020, Banks et al Nature Metabolism 2025). Currently, the same dataset can produce...

EchoMRI 3-in-1 Body Composition Analyzer Measures live mice up to 100g, tissue samples (including Zebrafish) of 10g, and biopsy samples up to 0.1g Measurements include lean mass, fat mass, and water mass 5 minutes per mouse No anesthesia required

Optogenetic stimulation of Agrp neurons in ChR2-expressing mice was performed in the Promethion calorimeter, with food intake, metabolic rate, body temperature, and activity measured during the stimulation period.

Sable Systems Promethion Indirect Calorimeter (32 cages) Food intake Water intake In-cage body mass measurement Physical activity (infrared beam breaks) Energy expenditure Oxygen consumption (VO2) Carbon dioxide production (VCO2) Respiratory exchange ratio – an indicator of carbohydrate or fat...

Male C57Bl/6J mice (10–14 weeks, JAX) were monitored in the Promethion indirect calorimeter at 30°C, 23°C, and 4°C, tracking body weight and energy expenditure, with data analyzed in CalR. ​

C57Bl/6J male mice were monitored in the Promethion indirect calorimeter, and data were analyzed in CalR to compare energy expenditure between T3-treated and vehicle groups (Hochbaum et al., Cell, 2024).

Analysis of diet-induced obesity experiments in male C57Bl/6J mice on a low-fat diet (LFD) or high-fat diet (HFD), demonstrating differences in body weight, energy intake, expenditure, and balance (Banks et al., Nature Metabolism, 2025). ​

Mice expressing DREADDs and non-DREADD controls were monitored in the Promethion indirect calorimeter, with CNO administered at hour 4 and data plotted in CalR.

Wheel-running activity was continuously recorded over several days, showing hourly running patterns and cumulative wheel counts across alternating light and dark cycles. ​

Physical activity was monitored by infrared beam breaks in the Promethion indirect calorimeter for one hour in either a mouse with ad libitum access to food or shortly after food removal. (Rubio et al., Mol Metabolism, 2023)