The Features Behind the Beneficial Effects of Interval-walking

NCT ID: NCT02257190

Last Updated: 2015-10-29

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

12 participants

Study Classification

INTERVENTIONAL

Study Start Date

2014-10-31

Study Completion Date

2015-10-31

Brief Summary

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A single bout of Interval-Walking (IW) exercise is superior to energy-expenditure and time-duration matched Continuous Walking (CW) exercise upon improving glycemic control. The reason IW is superior is unknown.

This study will look into whether it is the larger peak intensity during IW or if it is the alternating exercise pattern that is responsible for the larger improvements seen.

Subjects with type 2 diabetes will be included in a crossover, counter-balanced, controlled study, where each subject will undergo three trials. Trials will be identical except the following interventions:

1. One hour of rest (Con)
2. One hour of classical interval walking (repeated cycles of 3 min of fast and 3 min of slow walking; IW3)
3. One hour of fast alternating interval walking (repeated cycles of 1 min of fast and 1 min of slow walking; IW1).

After the interventions subjects will undergo a standardized mixed meal tolerance test, with consecutive measurements of blood glucose, insulin and c-peptide.

Detailed Description

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Conditions

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Diabetes Mellitus, Type 2

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

CROSSOVER

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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Control (Con)

No exercise intervention.

Group Type EXPERIMENTAL

Control

Intervention Type BEHAVIORAL

One hour of rest.

Interval Walking - 3 min intervals (IW3)

One hour of classical interval walking exercise (repeated cycles of 3 min of fast and 3 min of slow walking.

Group Type EXPERIMENTAL

IW3

Intervention Type BEHAVIORAL

A one hour exercise bout with repeated cycles of 3 min of fast and 3 min of slow walking

Interval Walking - 1 min intervals (IW1)

One hour of fast alternating interval walking exercise (repeated cycles of 3 min of fast and 3 min of slow walking

Group Type EXPERIMENTAL

IW1

Intervention Type BEHAVIORAL

A one hour exercise bout with repeated cycles of 1 min of fast and 1 min of slow walking

Interventions

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Control

One hour of rest.

Intervention Type BEHAVIORAL

IW3

A one hour exercise bout with repeated cycles of 3 min of fast and 3 min of slow walking

Intervention Type BEHAVIORAL

IW1

A one hour exercise bout with repeated cycles of 1 min of fast and 1 min of slow walking

Intervention Type BEHAVIORAL

Other Intervention Names

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No exercise 'Classical' interval walking Interval walking - 3 min intervals 'Fast alternating' interval walking Interval walking - 1 min intervals

Eligibility Criteria

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Inclusion Criteria

* Type 2 diabetes mellitus
* Body mass index \> 18 but \< 40 m2/kg
* Agreement to pause antidiabetic medication from 2 days before to after each trial

Exclusion Criteria

* Pregnancy
* Smoking
* Use of exogenous insulin
* Contraindication to increased levels of physical activity
* Evidence of thyroid, liver, lung, heart or kidney disease
Minimum Eligible Age

30 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Rigshospitalet, Denmark

OTHER

Sponsor Role lead

Responsible Party

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Anders Rasmussen Rinnov

MD, PhD

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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Kristian Karstoft, MD, PhD

Role: PRINCIPAL_INVESTIGATOR

Centre for Physical Activity Research, Rigshospitalet, Denmark

Locations

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Center for Physical Activity Research (CFAS)

Copenhagen, , Denmark

Site Status

Countries

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Denmark

References

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Jakobsen I, Solomon TP, Karstoft K. The Acute Effects of Interval-Type Exercise on Glycemic Control in Type 2 Diabetes Subjects: Importance of Interval Length. A Controlled, Counterbalanced, Crossover Study. PLoS One. 2016 Oct 3;11(10):e0163562. doi: 10.1371/journal.pone.0163562. eCollection 2016.

Reference Type DERIVED
PMID: 27695119 (View on PubMed)

Other Identifiers

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H-1-2014-060

Identifier Type: -

Identifier Source: org_study_id

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