Medical and Physiological Benefits of Reduced Sitting

April 7, 2020 updated by: Ilkka Heinonen, Turku University Hospital

Medical and Physiological Benefits and Mechanisms of Reduced Sitting Without Meeting the Current Physical Activity Recommendations

The most important objective of this randomized controlled trial in subjects with increased cardiovascular and metabolic risk factors is to investigate whether only reduced daily sitting improves human cardiovascular and metabolic health during a six-month intervention. It is hypothesized and expected that only reduced sitting, without formal physical activity or exercise training, affects favorably cardiovascular and metabolic health.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
64

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Finland
      • Turku, Finland, 20521
        • Turku PET Centre

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

40 years to 65 years (ADULT, OLDER_ADULT)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Physically inactive (less than 120 minutes of moderate intensity exercise per week measured by the activity monitor during run-in)
  • Sitting time ≥ 10 h /day (measured by the activity monitor during run-in)
  • BMI 25-40
  • Blood pressure < 160/100 mmHg
  • Fasting plasma glucose < 7.0 mmol/l
  • Fulfills the criteria of the metabolic syndrome according to Alberti et al 2009

Exclusion Criteria:

  • History of a cardiac event
  • Insulin or medically treated diabetes
  • Any chronic disease or condition that could create a hazard to the subject safety, endanger the study procedures or interfere with the interpretation of study results
  • Presence of ferromagnetic objects that would make MR imaging contraindicated
  • Abundant use of alcohol
  • Use of narcotics
  • Smoking of tobacco or consuming snuff tobacco
  • Diagnosed depressive or bipolar disorder
  • Previous PET imaging or considerable exposure to radiation

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: PREVENTION
  • Allocation: RANDOMIZED
  • Interventional Model: PARALLEL
  • Masking: SINGLE

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
EXPERIMENTAL: Reduced sitting
Objectively measured daily inactive time will be reduced by one hour compared to the baseline.
Behavioral: Reduced sitting
Subjects are guided to limit their sitting time during the day for 1 hour/day, by adding light activity with the help of an activity monitor. Subjects are not encouraged to increase their moderate to vigorous physical activity levels.
NO_INTERVENTION: Control
Subjects will be guided to maintain their normal sedentary behaviour and physical activity habits.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
The change in whole-body insulin sensitivity
Time Frame: The change from baseline to 6 months
M-value during the hyperinsulinemic euglycemic clamp
The change from baseline to 6 months
The change in skeletal muscle insulin-stimulated glucose uptake
Time Frame: The change from baseline to 6 months
Glucose uptake in the femoral muscles will be measured by positron emission tomography (PET) with [18F]-labelled fluoro-deoxy-glucose (FDG) tracer during hyperinsulinemic euglycemic clamp
The change from baseline to 6 months

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
daily sitting hours
Time Frame: through study completion, an average of 6 months
Accelerometry data will be collected during the whole intervention period by a triaxial hip-mounted accelerometer
through study completion, an average of 6 months
daily hours spent physically active
Time Frame: through study completion, an average of 6 months
Accelerometry data will be collected during the whole intervention period by a triaxial hip-mounted accelerometer
through study completion, an average of 6 months
The change in liver adiposity
Time Frame: The change from baseline to 6 months
Liver fat content will be assessed using magnetic resonance spectroscopy (MRS)
The change from baseline to 6 months
The change in maximal oxygen uptake
Time Frame: The change from baseline to 6 months
Maximal oxygen uptake (VO2peak) will be determined by cycle ergometry with direct respiratory measurements. Exercise intensity will be started at 50 W and the intensity will be increased by 25 W at every two minutes until the criteria used to establish the VO2peak are met. The criteria used to establish the VO2peak are a plateau in VO2 despite of an increase in intensity and a respiratory quotient greater than 1.1. or volitional fatigue.
The change from baseline to 6 months
The change in body fat percentage
Time Frame: The change from baseline to 3 months
Air displacement plethysmography (the Bod Pod system, COSMED, Inc., Concord, CA, USA) will be used to measure body composition (fat mass and fat free mass) with thoracic gas volume being predicted.
The change from baseline to 3 months
The change in body fat percentage
Time Frame: The change from baseline to 6 months
Air displacement plethysmography (the Bod Pod system, COSMED, Inc., Concord, CA, USA) will be used to measure body composition (fat mass and fat free mass) with thoracic gas volume being predicted.
The change from baseline to 6 months
The change in plasma glucose
Time Frame: The change from baseline to 3 months
Plasma glucose content will be measured from fasting venous blood samples using standard assays
The change from baseline to 3 months
The change in plasma glucose
Time Frame: The change from baseline to 6 months
Plasma glucose content will be measured from fasting venous blood samples using standard assays
The change from baseline to 6 months
The change in HbA1c
Time Frame: The change from baseline to 3 months
Glycated hemoglobin will be measured from fasting venous blood samples using standard assays
The change from baseline to 3 months
The change in HbA1c
Time Frame: The change from baseline to 6 months
Glycated hemoglobin will be measured from fasting venous blood samples using standard assays
The change from baseline to 6 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Turku University Hospital

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
UKK Institute

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Study Chair: Juhani Knuuti, Professor, Turku PET Centre, Turku University Hospital

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (ACTUAL)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
April 25, 2017

Primary Completion (ACTUAL)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
February 14, 2020

Study Completion (ACTUAL)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
March 4, 2020

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
March 24, 2017

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
March 30, 2017

First Posted (ACTUAL)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
April 5, 2017

Study Record Updates

Last Update Posted (ACTUAL)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
April 8, 2020

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
April 7, 2020

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
April 1, 2020

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • T91/2017

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

UNDECIDED

IPD Plan Description

IPD of the main outcome measures will be opened if possible.

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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