Energy Expenditure From ECAL Indirect Calorimeter in a Multicomponent Weight Management Service

Summary

Whether greater weight loss is as a result of a smaller reduction in energy expenditure with caloric restriction is not known. Resting energy expenditure and 24-hour energy expenditure vary substantially between individuals. In some cases, relatively reduced rates of 24h EE predict weight gain in some populations who have high prevalence of obesity. Obese individuals that lose weight experience a decrease in 24-h EE and resting energy expenditure that is lower than predicted based on changes in body composition. Most weight loss studies have found a large individual variation in the amount of weight change, and whether an individual's response to an intervention can be predicted is not clear. Measurements of 24-hour EE in response to fasting may help predict weight loss. The ECAL indirect calorimeter (ECAL) is a validated device purpose-built to provide the practitioner and patient with energy information that allows for more accurate, reliable method of establishing an obese individuals' metabolic profile. The aim of this study is to determine whether providing energy information from ECAL indirect calorimeter as an adjunct to the multicomponent weight management intervention in non-diabetic obese and severely obese individuals would help predict the response of weight loss.

Conditions

• Obesity
• Severe Obesity
• Sleep Apnoea

Interventions

DEVICE

ECAL Indirect Calorimeter

The ECAL is an open-circuit portable indirect calorimeter that measures both volume of CO2 expired and O2 consumed using a small mixing chamber. Participants will breathe through a mouthpiece with a nose clip applied whilst lying in a restful and comfortable position for 15 minutes. ECAL device will provide breath-by-breath measurements of the resting energy expenditure and respiratory quotient which will allow both practitioners and participants to monitor their metabolic health and compare the effect of dietary and physical activity intervention over the course of the structured intensive lifestyle intervention (24-weeks).

BEHAVIORAL

Diet, exercise & behaviour modification therapy

Standard care (SC) - participants receive standard care (diet, exercise \& behaviour modification therapy) as part of the multicomponent weight management intervention within the tier 3 weight management service. Practitioners will rely on standard predictive equations to provide dietary advice and intervention.

Sponsors & Collaborators

• Metabolic Health Solutions UK

  collaborator UNKNOWN

• University of Liverpool

  lead OTHER

Principal Investigators

• John Wilding, DM FRCP · University of Liverpool

Study Design

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

DOUBLE

Model

PARALLEL

Eligibility

Min Age

18 Years

Max Age

70 Years

Sex

ALL

Healthy Volunteers

Yes

Timeline & Regulatory

Start

2018-11-28

Primary Completion

2022-08-25

Completion

2022-08-25

Countries

• United Kingdom

Study Locations