MOTIONPOD (TM) Validation and Calibration Study

Hospices Civils de Lyon60 enrolled

Overview

In this study we propose 1) to develop a new multisensor monitoring system associating a tri-axial accelerometer and a magnetometer to measure physical activity in free-living adults, 2) to perform its calibration and assess its validity in a series of activity tasks in comparison with the measure of energy expenditure by indirect calorimetry as the criterion measure, and with existing physical activity monitors (cardiofrequencemetry and accelerometers used either alone or in combination). Briefly the subjects will perform a series of standardized activity tasks of different intensities and a 30-min free physical activity period while wearing 6 MOTIONPOD(TM) and different commercial activity monitors. Physical activity energy expenditure will be measured using a metabolic gas analyser. Data of the 30 first subjects will be used to develop new algorithms to identify the different activity tasks and to estimate the related energy expenditures. Data of the following 30 subjects will be used to validate the MotionPOD(TM) against indirect calorimetry and existing physical activity monitors

Study Type

INTERVENTIONAL

Allocation

Purpose

OTHER

Masking

NONE

Enrollment

Conditions

Energy Expenditure

Interventions

It is a study with a single arm. The MOTIONPOD TM measures are compared with simultaneous estimations obtained with the criteria measure (indirect calorimeter) and with existing activity monitors (heart rate monitor POLAR; different accelerometers - rT3 et Actigraph GT3X-, Actiheart, Sensewear Pro2 Armband) After physical fitness evaluation, different activity monitors are set up and the subjects perform a series of standardised activity tasks of different intensities, and well as a 30-min free activity period. Physical activity energy expenditure is measured at the end of each task using a metabolic gas analyser

Eligibility

Sex: ALLMin age: 18 YearsMax age: 55 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * Normal-weight, overweight or obesity according to body mass index * Low,moderate or high level of physical activity as estimated by questionnaire * No angina and/or peripheral arterial disease symptoms or medical history Exclusion Criteria: * Subjects with cardiac implants * Claustrophobic subjects * Drug use that could affect energy expenditure * Medical history or evolving disease which are a contra-indication for moderate physical exercise

Outcomes

Primary Outcomes

Estimation by the MOTIONPODTM of the physical activity energy expenditure (PAEE) during a 30-min free activity period in comparison with the measure of PAEE by indirect calorimetry

Time frame: 30 minutes

Secondary Outcomes

Identification and classification of the tasks performed during a 30-min free activity period

Time frame: 30 minutes

Estimation by the MOTIONPODTM of the physical activity energy expenditure during each of the tasks performed during the experiment in comparison with 1) indirect calorimetry, 2) existing commercially activity monitors

Time frame: During three hours

Intensity classification by the MOTIONPODTM of the physical activity energy expenditure during each of the tasks performed during the experiment and during the 30-min free activity period.

Intensity classification by the MOTIONPODTM of the physical activity energy expenditure during each of the tasks performed during the experiment and during the 30-min free activity period in comparison with 1) indirect calorimetry, 2) existing commercially activity monitors