Internet-based Physical Activity Intervention

Phase 3

Completed

• Conditions: Physical Activity
• Interventions: Behavioral: website assess

• Registration Number: NCT01295203
• Lead Sponsor: University of Southern Denmark

Brief Summary

The purpose of this study is to determine whether access to a website with personalized feedback on physical activity level and suggestions to increase physical activity results in improvements in self-reported physical activity, anthropometrics and physiological measurements

Detailed Description

In a website-based intervention study, the investigators wish to examine if it is possible to increase physical activity among inactive persons. Main objective is to determine if access to a website with personalized feedback on PA level and suggestions to increase PA results in improvements in self reported PA, anthropometrics and applied physiological measurements.

Physical inactive adults (n=12,287) participating in a nationwide health survey and examination (DANHES) were asked to randomly assigned to either intervention (n=6,055) or control group (n=6,232). The intervention group had access to a PA website with personalized advice and suggestions to increase PA. After 3 and 6 months, a follow-up questionnaire was administered by e-mail. The 7-day International Physical Activity Questionnaire was included in the questionnaires to assess four domains of PA in daily-life (work, transportation, domestic, and leisure-time) and sedentary time. Furthermore, at the 3 month follow-up a subgroup of participants (n=1,190) were invited complete anthropometrics and physiological measurements.

Study Timeline

• Status Verified: 2008-05
• Study Start: 2008-05
• Primary Completion: 2009-05
• Study Completion: 2009-05
• Study First Submitted: 2011-02-11
• Study First Submitted QC: 2011-02-11
• Last Update Submitted: 2011-02-11
• Study First Posted: 2011-02-14
• Last Update Posted: 2011-02-14

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 12287

Inclusion Criteria

• Healthy adults
• Physically inactive in leisure time (assessed by self reported questionnaire)

Exclusion Criteria

• Presence of serious heart problems or not being able to perform everyday activities
• Highly physically active in leisure time (assessed by self reported questionnaire)

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Control group	website assess	The control group were not given access to the intervention website and received no additional information.

Primary Outcome Measures

Name	Time	Method
Self reported physical activity	After 6 month	Physical activity was assessed self reported with the International Physical Activity Questionnaire (IPAQ)

Secondary Outcome Measures

Name	Time	Method
blood pressure	3 month	Systolic and diastolic blood pressure were measured by fully automatic clinically validated blood pressure monitors (UA 779, UA-767 Plus 30 or UA 767 PC, A\&D Company Ltd, Tokyo, Japan)
Hip and Waist circumference	after 3 month	Hip and waist circumference was measured with a body tape (Chasmors WM02 Body Tape, Chasmors Ltd.,London, United Kingdom) to the nearest 1.0 cm. Waist circumference was measured midway between the iliac crest and the costal margin following a quiet expiration, and lastly hip circumference was measured at the maximal circumference over the buttocks and below the iliac crest.
Fat percentage	after 3 month	Fat percentage was measured to the nearest 0.1 kg and percent point with a Segmeantal Body Composition Analyser (type BC-418 MA, Tanita Corp., Tokyo, Japan).
blood samples	After 3 months	Non-fasting venous blood samples were collected for future analyses of P-cholesterol, P-triglyceride, and haemoglobin A1c and for biobank storage.
Body weight	after 3 month	Body weight was measured to the nearest 0.1 kg and percent point with a Segmeantal Body Composition Analyser (type BC-418 MA, Tanita Corp., Tokyo, Japan).
Aerobic fitness	after 3 month	Estimated during a max (watt-max) or a sub-maximal test on a ergometer bike depending on the physical condition of the participant (Ergomedic 828E, Monark Exercise AB, Vansbro, Sweden). One of the following conditions contraindicated participation in the watt-max test: Any heart-related disease, chest pain, hypertension (\>160/100 mmHg), heart or lung (pulmonary) medication, pregnancy and muscle, joint or skeletal problems. The sub-max test was contradicted by hypertension (\>180/110 mmHg), severe heart-related disease, certain types of heart medication, muscle, joint or skeletal problems.
Arm muscle strength	after 3 month	Arm mucle strength was measured by bending of the arms with a Takei TKK 5402 digital back strength dynamometer (Takei Scientific Instruments Co. Ltd., Tokyo, Japan). The test was performed with maximal exertion.

Trial Locations

Locations (4)

Municipality of Varde; 🇩🇰 Varde, Denmark

Municipality of Frederiksberg; 🇩🇰 Frederiksberg, Denmark

National Institute of Public Health; 🇩🇰 Copenhagen, Denmark

Municipality of Silkeborg; 🇩🇰 Silkeborg, Denmark