A Smartphone Application to Evaluate Energy Expenditure and Duration of Moderate-intensity Activities
|ClinicalTrials.gov Identifier: NCT01995253|
Recruitment Status : Completed
First Posted : November 26, 2013
Last Update Posted : November 26, 2013
|Condition or disease||Intervention/treatment||Phase|
|The Focus of the Study Was to Estimate Energy Expenditure Thanks to Accelerometry Data Collected by a Smartphone.||Device: Energy expenditure estimation in controlled conditions Device: Energy expenditure estimation in free-living conditions||Not Applicable|
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.
|Study Type :||Interventional (Clinical Trial)|
|Actual Enrollment :||16 participants|
|Intervention Model:||Parallel Assignment|
|Masking:||None (Open Label)|
|Official Title:||A Smartphone Application to Evaluate Energy Expenditure and Duration of Moderate-intensity Activities|
|Study Start Date :||September 2012|
|Actual Primary Completion Date :||November 2012|
|Actual Study Completion Date :||October 2013|
|Experimental: Controlled conditions||
Device: Energy expenditure estimation in controlled conditions
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.
|Experimental: Free-living conditions||
Device: Energy expenditure estimation in free-living conditions
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.
- 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)
- Energy expenditure [ Time Frame: one point recorded each minute for 3h30 in controlled conditions or 12 hours in free-living conditions ]Sensor: Armband
- Energy expenditure [ Time Frame: one point recorded each minute for 3h30 in controlled conditions or 12 hours in free-living conditions ]Sensor: Actiheart
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01995253
|Centre de Recherche en Nutrition Humaine Auvergne|
|Clermont Ferrand, France, 63000|