NCT01398059

The Metabolic Effects of Breaks in Sedentary Time

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 19 (actual)
• Sponsor: Children's Hospital of Eastern Ontario · Academic / Other
• Sex: All
• Age: 10 Years – 14 Years
• Healthy volunteers: Accepted

Summary

The purpose of this study is to determine whether acute bouts of sedentary behaviour (with or without breaks and/or structured physical activity) result in measurable changes in metabolic health in children and youth.

Detailed description

North American children spend the majority of their waking hours engaging in sedentary behavior (e.g. sitting). Research in adults and animal models suggests that even short bouts of uninterrupted siting may result in acute changes increases in cardiometabolic risk, although to date no studies have investigated this relationship in children and youth. The purpose of this study is to assess the feasibility of a protocol which will expose participants aged 10-14 years to a full day of uninterrupted sitting, and to determine the impact of this protocol on markers of cardiometabolic risk (insulin, glucose, triglyceride, HDL-C and LDL-C) as well as subsequent food intake and physical activity. The impact of uninterrupted sitting will be compared to the impact of interrupted sitting, with and without the inclusion of moderate physical activity.

Conditions

• Feasibility
• Insulin
• Glucose
• Lipids
• Eating

Interventions

Type	Name	Description
OTHER	Sedentary	In this condition, participants will engage in 8 hours of uninterrupted sedentary behaviour.
OTHER	Sedentary With Breaks	In this condition participants will engage in 8 hours of sitting, although the sitting will be interrupted every 20 minutes. During these interruptions participants will spend 2 minutes walking at an intensity equivalent to 30% of VO2peak.
OTHER	Sedentary With Breaks and Physical Activity	In this condition participants will engage in 8 hours of sitting, although the sitting will be interrupted every 20 minutes. During these interruptions participants will spend 2 minutes walking at an intensity equivalent to 30% of VO2peak. Participants will also engage in 20 minutes of structured physical activity at an intensity of 60% of VO2peak in both the morning and afternoon.

Timeline

• Start date: 2011-07-01
• Primary completion: 2012-08-01
• Completion: 2012-08-01
• First posted: 2011-07-20
• Last updated: 2019-07-24
• Results posted: 2019-07-24

Locations

1 site across 1 country: Canada