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Completed

NCT Number: NCT01995253

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

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.

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Key information

Conditions

Accelerometry

Age range

18 year–60 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Centre de Recherche en Nutrition Humaine Auvergne

Clermont-Ferrand, 63000, France

About this study

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.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

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

Treatment and study plan

Energy expenditure estimation in controlled conditions

Device

Volunteers were asked to perform several activities such as walking at different paces, running, sitting, standing still or taking public transportation for about 3h30 They wore 2 research sensors that estimate energy expenditure: Armband and Actiheart. They also wore a smartphone (in a front pant pocket) that collected accelerometry data.

Energy expenditure estimation in free-living conditions

Device

Volunteers were asked to wear sensors during about 12 hours, one day. They wore 2 research sensors that estimate energy expenditure: Armband and Actiheart. They also wore a smartphone (in a front pant pocket) that collected accelerometry data.

Primary outcomes

  1. Accelerometry

    Time frame: about 17Hz (duration: 3h30 in controlled conditions; 12 hours in free-living conditions)

    Measures acquired by a smartphone (it contains several sensors, including a tri-axial accelerometer)

Secondary outcomes

  1. Energy expenditure

    Time frame: one point recorded each minute for 3h30 in controlled conditions or 12 hours in free-living conditions

    Sensor: Armband

  2. Energy expenditure

    Time frame: one point recorded each minute for 3h30 in controlled conditions or 12 hours in free-living conditions

    Sensor: Actiheart

Sponsors and collaborators

Lead sponsor

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

Other

Collaborators

  • Almerys

Registry information

Important dates

Study start
2012
Primary completion
2012
Study completion
2013
First posted
Nov 26, 2013
Registry last updated
Apr 3, 2024

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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