Clinical trial NCT04973813: Active Choice Intervention About Physical Activity for Physically Inactive Adults
Official title: Effects of an Active Choice Intervention on Physical Activity Intentions and Behaviour Among Physically Inactive Adults: A Four-Arm Web-Based Experiment
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Physical Activity
Keywords: Physical activity intervention
Active choice
Decision making
Web-based
Lead sponsor: Amsterdam UMC, location VUmc
Sponsor class: OTHER
First posted: 2021-07-22
Enrollment: 564
Sex: ALL
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: BASIC_SCIENCE

Brief summary: This web-based experimental study aims to ascertain whether promoting an active (i.e. conscious and autonomous) choice process about physical activity results in better behavioural outcomes (e.g. physical activity) and psychological outcomes (e.g. physical activity intention) compared to promoting a passive choice process in physically inactive adults.

Detailed description: In this web-based experimental study, the investigators will use a pre-test post-test four-arm parallel design to compare the effect of promoting an active choice process versus a passive choice process about physical activity on behavioural outcomes (e.g. physical activity behaviour, perceived increase in physical activity) and psychological outcomes (e.g. physical activity intention, commitment) among physically inactive adults.

Participants will be randomized to one of four groups. Participants in group GA+ will be encouraged to make a very active choice by weighing advantages and disadvantages of physical activity, considering personal values, identifying barriers and engaging in action and coping planning. The intervention for group GA is similar, but lacks the action and coping planning exercises. In the other two groups, a passive choice process will be promoted by only providing information: Group G will read the national physical activity guideline and group GI will read the guideline and information about possible advantages and disadvantages and barriers to physical activity. Behavioural and psychological outcomes will be assessed at the first measurement and follow-up measurement. Regression analyses will be performed to examine intergroup differences. In addition, sensitivity analyses and a process evaluation will be performed.

Eligibility criteria: Inclusion Criteria:

* Low levels of physical activity (i.e. physically active for at least 30 minutes on \<5 days a week and engaging in \<150 minutes of physical activity in total throughout an average week)

Exclusion Criteria:

* Pregnancy
* Wheelchair user
* Not being able to walk a minimum of 100 meters

Primary outcomes:
measure: Intention
timeFrame: Directly after the intervention (Day 0)
measure: Physical activity
timeFrame: Change from baseline at approximately 18 days
Secondary outcomes:
measure: Sitting time
timeFrame: Change from baseline at approximately 18 days
measure: Perceived change in physical activity compared to baseline
timeFrame: Change from baseline at approximately 18 days
measure: Intention strength
timeFrame: Change from day 0, at approximately 18 days
measure: Active choice
timeFrame: Directly after the intervention (Day 0)
measure: Autonomous choice
timeFrame: Directly after the intervention (Day 0)
measure: Commitment
timeFrame: Directly after the intervention (Day 0)
measure: Commitment
timeFrame: Change from day 0, at approximately 18 days follow-up
measure: Self-efficacy
timeFrame: Directly after the intervention (Day 0)
measure: Self-efficacy
timeFrame: Change from day 0, at approximately 18 days follow-up
measure: Satisfaction about one's plan
timeFrame: Directly after the intervention (Day 0)
measure: Alignment of choice with personal values
timeFrame: Directly after the intervention (Day 0)
measure: Perceived advantages and disadvantages of physical activity
timeFrame: During intervention (Day 0)
measure: Value of health
timeFrame: During intervention (Day 0)
measure: Values influencing physical activity
timeFrame: During intervention (Day 0)
measure: Plans to change physical activity
timeFrame: During intervention (Day 0)
measure: Perceived barriers to physical activity
timeFrame: During intervention (Day 0)
measure: Plans to cope with perceived barriers
timeFrame: During intervention (Day 0)
measure: Factors supporting physical activity
timeFrame: Follow-up; approximately 18 days after the intervention (day 0)
measure: Barriers to physical activity
timeFrame: Follow-up; approximately 18 days after the intervention (day 0)
Other outcomes:
Locations:
city: Amsterdam
country: Netherlands
facility: VUMedicalCenter
state: Noord-Holland
Study officials:
affiliation: Amsterdam UMC
name: Danielle Timmermans, Prof. dr.
role: STUDY_DIRECTOR
affiliation: Amsterdam UMC
name: Evert Verhagen, Prof. dr.
role: STUDY_DIRECTOR
References:
citation: Landais LL, Damman OC, Jelsma JGM, Verhagen EALM, Timmermans DRM. Promoting an active choice among physically inactive adults: a randomised web-based four-arm experiment. Int J Behav Nutr Phys Act. 2022 Apr 27;19(1):49. doi: 10.1186/s12966-022-01288-y.