A Smartphone Application to Evaluate Energy Expenditure and Duration of Moderate-intensity Activities

Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement

Status

Completed

Conditions

Accelerometry

Treatments

Device: Energy expenditure estimation in free-living conditions

Device: Energy expenditure estimation in controlled conditions

Study type

Interventional

Funder types

Other

Identifiers

NCT01995253

AU979

2012-A00809-34 (Other Identifier)

Details and patient eligibility

About

The aim of this study was to find functions for estimating energy expenditure in free-living conditions. This method was based on accelerometry data acquired from a smartphone worn in a trouser pocket. The developed functions have been compared to the estimations provided by two research devices named Armband and Actiheart.

Full description

There is a growing interest in evaluating physical activity and energy expenditure (EE) to provide feedback to the user. The use of mass-market sensors such as accelerometers offers a promising solution for the general public due to the growing smartphone market over the last decade.

Thus, the proposed EE estimation function has been created using accelerometry data collected from 10 volunteers equipped with a smartphone and two research sensors (Armband and Actiheart) used to estimate EE during several controlled activities. The research sensors' data serves as reference during the creation and evaluation of the proposed function.

It has been evaluated with data of 6 other volunteers in free-living conditions. This new EE function using the smartphone technology is dedicated to light- and moderate-intensity activities, and we believe it can be a new way to help people controlling their daily physical activity level.

Enrollment

16 patients

Sex

All

Ages

18 to 60 years old

Volunteers

Accepts Healthy Volunteers

Inclusion criteria

men and women
age: 18-60 years
BMI between 18.5 and 25 kg/m²
subject considered as healthy after clinical examination and medical questionnaire
women of childbearing age: negative beta-HCG
subject with normal rest electrocardiogram (validated by a cardiologist)
subject with normal blood pressure (<140/90 mm Hg) with or without medical treatment
subject with no foot pad problem
subject giving his/her written informed consent
subject willing to comply with study procedures
affiliated to National Health Insurance

Exclusion criteria

respiratory failure or cardiovascular problem
known cardiac decompensation or myocardial infarction
surgery made less than 6 months before the study beginning
pregnant women and nursing mother
current infectious pathology
abnormal electrocardiogram
not affiliated to national health insurance people
under legal guardianship
refusal to sign informed consent
refusal to be registered on the national volunteers data file
currently participating or who having got 4500€ in this year before to have participated in another clinical trial