Internet-based Physical Activity Intervention
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
|Study Design:||Allocation: Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Basic Science
|Official Title:||Internet-based Physical Activity Intervention|
- Self reported physical activity [ Time Frame: after 3 month ] [ Designated as safety issue: No ]Physical activity was assessed self reported with the International Physical Activity Questionnaire (IPAQ)
- Self reported physical activity [ Time Frame: After 6 month ] [ Designated as safety issue: No ]Physical activity was assessed self reported with the International Physical Activity Questionnaire (IPAQ)
- Body weight [ Time Frame: after 3 month ] [ Designated as safety issue: No ]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).
- Fat percentage [ Time Frame: after 3 month ] [ Designated as safety issue: No ]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).
- Hip and Waist circumference [ Time Frame: after 3 month ] [ Designated as safety issue: No ]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.
- blood pressure [ Time Frame: 3 month ] [ Designated as safety issue: No ]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)
- Aerobic fitness [ Time Frame: after 3 month ] [ Designated as safety issue: No ]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 [ Time Frame: after 3 month ] [ Designated as safety issue: No ]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.
- blood samples [ Time Frame: After 3 months ] [ Designated as safety issue: No ]Non-fasting venous blood samples were collected for future analyses of P-cholesterol, P-triglyceride, and haemoglobin A1c and for biobank storage.
|Study Start Date:||May 2008|
|Study Completion Date:||May 2009|
|Primary Completion Date:||May 2009 (Final data collection date for primary outcome measure)|
No Intervention: Control group
The control group were not given access to the intervention website and received no additional information.
Behavioral: website assess
The internet intervention group were given assess to the intervention website which included a personal page with tailored physical activity advice and a personal profile together with Recommendations and general training programs.
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.
|National Institute of Public Health|
|Copenhagen, Denmark, 1353|
|Municipality of Frederiksberg|
|Frederiksberg, Denmark, 2000|
|Municipality of Silkeborg|
|Silkeborg, Denmark, 8600|
|Municipality of Varde|
|Varde, Denmark, 6800|
|Principal Investigator:||Andreas Wolff Hansen, Msc.||National Institute of public Health|