Active metabolic weight estimation using bioimpedance, indirect calorimetry and the clino-ortho maneuver

Abstract

The resting energy expenditure (REE) and substrate utilization are computed by indirect calorimetry technique (ICT). The REE represents 80-85% of the total energy expenditure (TEE) but only accounts for the 7% of the actual body weight (ABW). The TEE is produced by the organs plus muscles, whereas the REE accounts only for the main organs. An important problem comes up when the REE is computed throughout the fat free mass (FFM) computation or anthropometric measurements because they do not explain the tremendous catabolic variability by ICT when subjects show the same body composition. Therefore, the aim of this work is to develop a method to compute the metabolic active weight (MAW) as a new form that may help to understand the catabolic activity of the body composition. The premise was the clino-ortho maneuver can split the ABW in two parts: one in which the MAW reflects the FFM catabolism while the second part was not considered since there is not energy requirement in it. The experiment design studied 37 young volunteers undergoing the clino-ortho maneuver during fast and postprandial conditions. The results showed REE increments of 21% during phase I (fast), while in phase II (postprandial) only 14% was achieved in ortho-postprandial. Therefore, the computed MAWs were 65.5Kg and 58Kg, respectively, when the ABW average was 70 Kg and the FFM was 50 Kg. One first conclusion was that the 15.5 Kg of the MAW above the FFM could explain a catabolic equivalence which can be exclusively related to the fast-ortho position which can help to classify exclusively the dynamic over activity of the FFM.

VO2 and VCO2 variabilities through indirect calorimetry instrumentation

“…The objective of this work was to develop a pilot study where young healthy volunteer population was submitted to the physiological clino-orthostatic maneuver (COM) with the idea to generate steady/clinostatic and non-steady/orthostatic stages as a manner of an instrumental bench test (Gonzalez et al 2013 ; Cadena et al 2010 ). A hybrid calorimeter with the MC and the BbB techniques was applied to compare inter-individual variability changes during the COM stages.…”

Detección de la obesidad sarcopénica mediante el análisis de la composición corporal funcional (ACCF)

“…Concluyeron que esto es debido a la actividad metabólica de la MLG y que es develada por la maniobra acostado-parado [61]. La OS al parecer, no solo es un problema de disminución de la MLG sino también de la actividad metabólica de la misma, por lo que es importante medir si existe un decremento o incremento de la actividad metabólica de la MLG [62] [63].…”