Assess Whether Knowledge by the Younger of the Function of the Accelerometer Determines Its Amount of Physical Activity (ACCELORIX2)

Assess Whether Knowledge by the Children and Adolescents of the Function of the Accelerometer Determines Its Amount of Physical Activity

Eighty healthy youngsters, aged 10-18 years, will be equally randomized between the blinded and the non-blinded group. The blinded subjects will be informed that we were testing the reliability of a new device for body posture assessment and these youngsters will did not receive any information with regards to physical activity. Conversely, the non-blinded subjects were informed that the device was an accelerometer that assessed physical activity levels and patterns. Participants will be instructed to wear the accelerometer for 4 consecutive days and to keep a non-wear log diary over the 4 day-monitoring. The overall duration and the duration relative to the quality of the physical activity patterns (sedentary, light, moderate, vigorous and moderate to vigorous) were computed for each group during the 4-day monitoring, then compared between the two groups using the Student's t test.

Study Overview

• Status: Completed
• Conditions: Physical Activity
• Intervention / Treatment: Device: GT3X Actigraph accelerometer.

• Study Type: Interventional
• Enrollment (Actual): 80
• Phase: Not Applicable

Contacts and Locations

Study Locations

• France
  • Lille, France
    • Hôpital Jeanne de Flandre - CHRU de Lille

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 10 years to 18 years (Child, Adult)
• Accepts Healthy Volunteers: Yes

Description

Inclusion Criteria:

• 10-18 years old adolescent
• normal clinical examination,
• normal nutritional status at baseline defined by a weight / height ratio between - 2 and + 2 DS DS

Exclusion Criteria:

• abnormal ECG
• known chronic disease
• acute infection dating back at least a week.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Other
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: Single

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Other: non-blinded group; The non-blinded subjects will be informed that the accelerometer device (GT3X Actigraph accelerometer) is an accelerometer that assessed physical activity levels and patterns	Device: GT3X Actigraph accelerometer.
Other: blinded group; The blinded subjects will be informed that they will test the reliability of a new device for body posture assessment and these youngsters will not receive any information with regards to physical activity.	Device: GT3X Actigraph accelerometer.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
physical activity by GT3X Actigraph accelerometer.	The physical activity measured in counts/day using an GT3X Actigraph accelerometer. Participants were instructed to wear the accelerometer for 4 consecutive days and to keep a non-wear log diary over the 4 day-monitoring.	during 4 days

Collaborators and Investigators

• Sponsor: University Hospital, Lille
• Investigators: Principal Investigator: Frédéric Gottrand, MD, PhD, University Hospital, Lille

Publications and helpful links

General Publications

• Vanhelst J, Beghin L, Drumez E, Coopman S, Gottrand F. Awareness of wearing an accelerometer does not affect physical activity in youth. BMC Med Res Methodol. 2017 Jul 11;17(1):99. doi: 10.1186/s12874-017-0378-5.
• Vanhelst J, Vidal F, Drumez E, Beghin L, Baudelet JB, Coopman S, Gottrand F. Comparison and validation of accelerometer wear time and non-wear time algorithms for assessing physical activity levels in children and adolescents. BMC Med Res Methodol. 2019 Apr 2;19(1):72. doi: 10.1186/s12874-019-0712-1.

Study record dates

Study Major Dates

• Study Start: July 1, 2013
• Primary Completion (Actual): June 1, 2015
• Study Completion (Actual): June 1, 2015

Study Registration Dates

• First Submitted: July 13, 2016
• First Submitted That Met QC Criteria: July 25, 2016
• First Posted (Estimated): July 26, 2016

Study Record Updates

• Last Update Posted (Estimated): December 22, 2025
• Last Update Submitted That Met QC Criteria: December 15, 2025
• Last Verified: October 1, 2016

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Behavior; Motor Activity
• Other Study ID Numbers: 2012_29; 2012-A01647-36 (Other Identifier: ID-RCB number, ANSM)

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO