Clinical trial NCT03236597: Assessing the Effects Of Treadmill On LPA, Sitting Time, and Cardiovascular Risk
Official title: Assessing the Effects Of Treadmill On Light Physical Activity, Sitting Time, And Cardiovascular Risk
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Sedentary Lifestyle
Risk Factor, Cardiovascular
Lead sponsor: University of Minnesota
Sponsor class: OTHER
First posted: 2017-08-02
Enrollment: 15
Sex: ALL
Minimum age (years): 18
Maximum age (years): 70
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: CROSSOVER
Intervention model description: A within-person, cross-over design will be used. Fifteen participants will take part in two conditions: 1) the treadmill desk: this intervention will ask participants to use a treadmill desk for a minimum of 30min per day for four weeks; and 2) the usual desk condition: participants will use their current workstation, as is, for four weeks. Participants will be randomly assigned to their initial intervention condition after baseline measures have been collected. In addition to the two condition months, there will be a one-week baseline period (to collected information on habitual activity level at work).
Primary purpose: TREATMENT

Brief summary: The purpose of this study is to:

1. Evaluate the relative efficacy of a treadmill desk intervention on light physical activity and sitting behaviors at work over four weeks;
2. Evaluate the relative efficacy of a treadmill desk intervention on the cardiovascular risk profiles (blood pressure, body weight, body fat percentage) over a four-week period.

Detailed description: American workers spend 70-80% of their time at work sitting at a desk, working on a computer, talking on a telephone, and sitting in meetings. Traditional approaches to increase MVPA in the workplace may not be sustainable as they require deliberate and dedicated time away from work, and may be perceived as harmful to productivity. Sedentary behavior interventions, in contrast, do not interfere with daily tasks and productivity and require small but cumulative changes in posture and LPA throughout the workday.

Sedentary behavior interventions in the worksite, including those conducted by our team, have shown promising effects. Studies that have used multi-level approaches targeting individual, social, and environmental factors have been most effective. The most robust environmental support has been the use of sit-stand workstations, providing distinct opportunities for workers to reduce sitting while maintaining productivity. However, treadmill desks may provide an even greater opportunity to both reduce sitting and increase LPA during the workday. Thus, a pilot study is required to test the efficacy of this approach to reduce sitting and increase LPA in the workplace.

Eligibility criteria: Inclusion Criteria:

* Not currently pregnant or planning to become pregnant during the 11 week study period.
* Able to read and write in English.
* No current use of a sit/stand or treadmill desk.
* Work that is done in a predominately stationary position.
* Working at UMN West Bank Office Building at least 30 hours per week.
* Not currently meeting physical activity guidelines.
* No balance issues (i.e. healthy vestibular system)
* No contraindications to standing or walking
* Weight stable for the past 12 months.
* Taking no more than 3 prescription drugs, with stable dosage, over the past 12 months
* Answer of no to all Physical Activity Readiness-Questionnaire (PAR-Q) questions

Exclusion Criteria:

* Currently pregnant or actively trying to become pregnant during the 14 week study period.
* Unable to read and write in English.
* Working less than 30 hours per week.
* Currently meeting physical activity guidelines.
* Non-sedentary job.
* Current use of treadmill desk
* Any reported balance problems
* Anyone with contraindications to standing or walking
* Weight fluctuations of more than +/- 10% of their body weight in the past year
* Individuals taking more than 4 prescription drugs and/or unstable dosage of medications over the past 12 months if taking 3 or less.
* Answer of yes to any PAR-Q questions

Primary outcomes:
measure: Time spent sitting
timeFrame: 7-days
measure: Time spent standing
timeFrame: 7-days
measure: Time spent moving
timeFrame: 7-days
Secondary outcomes:
measure: Cardiovascular risk: Blood pressure
timeFrame: 7-days
measure: Cardiovascular risk: Body weight
timeFrame: 7-days
measure: Cardiovascular risk: Percent body fat
timeFrame: 7-days
Other outcomes:
Locations:
city: Minneapolis
country: United States
facility: University of Minnesota West Bank Office Building
state: Minnesota
Study officials:
References: