Condition category
Not Applicable
Date applied
28/04/2006
Date assigned
28/04/2006
Last edited
20/10/2008
Prospective/Retrospective
Retrospectively registered
Overall trial status
Completed
Recruitment status
No longer recruiting

Plain English Summary

Not provided at time of registration

Trial website

Contact information

Type

Scientific

Primary contact

Dr Emely de Vet

ORCID ID

Contact details

Erasmus Medical Center
Department of Public Health
P.O. Box 2040
Rotterdam
3000 CA
Netherlands
+31 (0)10 4638460
e.devet@erasmusmc.nl

Additional identifiers

EudraCT number

ClinicalTrials.gov number

Protocol/serial number

NTR620

Study information

Scientific title

Acronym

Study hypothesis

We hypothesised that forming implementation intentions (II) may increase levels of physical activity.

Ethics approval

Received from the local medical ethics committee

Study design

Randomised controlled parallel group trial

Primary study design

Interventional

Secondary study design

Randomised controlled trial

Trial setting

Not specified

Trial type

Prevention

Patient information sheet

Condition

No condition, healthy person

Intervention

Participants were randomly assigned to one of four conditions:
1. Control group
2. Forming single implementation intentions for walking
3. Forming implementation intentions for self-selected activities
4. Forming repeated implementation intentions for self-selected activities

At the end of the pretest questionnaire, all participants were asked to increase their physical activity with at least two hours per week. The participants in the II groups (group 2, 3 and 4) were additionally asked to write down:
1. What activity they were planning to do
2. What day(s) they were planning to do this activity
3. When they were planning the activity (e.g. before or after work)
4. Where they would do the selected activity (e.g. in the park)
5. What time they would spent doing the activity
This exact procedure was employed at three moments for participants in the repeated II condition (group 4) and at pretest with respect to walking instead of self-selected activities for the single II for walking group (group 2). Forming implementation intentions took about ten minutes.

Intervention type

Other

Phase

Not Specified

Drug names

Primary outcome measures

Post-tests took place two weeks, three months and six months post-intervention and included measures of body mass index (BMI), physical activity, and cognitions.

Secondary outcome measures

No secondary outcome measures

Overall trial start date

01/03/2004

Overall trial end date

01/09/2005

Reason abandoned

Eligibility

Participant inclusion criteria

Adults aged between 18 and 65 years.

Participant type

Patient

Age group

Adult

Gender

Both

Target number of participants

709

Participant exclusion criteria

Does not comply with the above inclusion criteria

Recruitment start date

01/03/2004

Recruitment end date

01/09/2005

Locations

Countries of recruitment

Netherlands

Trial participating centre

Erasmus Medical Center
Rotterdam
3000 CA
Netherlands

Sponsor information

Organisation

Erasmus Medical Center (The Netherlands)

Sponsor details

P.O. Box 2040
Rotterdam
3000 CA
Netherlands

Sponsor type

University/education

Website

Funders

Funder type

Research organisation

Funder name

The Netherlands Organisation for Health Research and Development (ZonMw) (The Netherlands)

Alternative name(s)

Funding Body Type

Funding Body Subtype

Location

Results and Publications

Publication and dissemination plan

Not provided at time of registration

Intention to publish date

Participant level data

Not provided at time of registration

Results - basic reporting

Publication summary

Publication citations

Additional files

Editorial Notes