Step-reduction in Older Men and Women

NCT ID: NCT03039556

Last Updated: 2017-02-01

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

22 participants

Study Classification

INTERVENTIONAL

Study Start Date

2015-09-30

Study Completion Date

2016-05-31

Brief Summary

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This study investigates the effects of two weeks of reduced daily ambulation and a subsequent return to normal physical activity on metabolic health of older adults.

Detailed Description

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Aging results in a progressive loss of muscle mass that is accelerated by periods of muscular disuse, common for older adults during hospitalization or convalescence from illness. Transient physical inactivity has been shown to cause muscular atrophy and impairments in insulin sensitivity in both younger and older adults. However, the recovery capacity of older adults after such physical inactivity remains unknown. This study aims to determine the impact of two weeks of daily step reduction to ≤1000 steps per day, an experimental model mimicking short-term physical inactivity, on glycemic control in older adults and further investigate whether older adults are able to recover from the consequences of this inactivity simply by returning to their habitual activity for 14 days.

Conditions

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Older Adults Reduced Physical Activity

Study Design

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Allocation Method

NA

Intervention Model

SINGLE_GROUP

Primary Study Purpose

BASIC_SCIENCE

Blinding Strategy

NONE

Study Groups

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Change in physical activity for older adults

Older adult participants undergo alterations in daily ambulation by completing Normal Daily Steps for one week, followed by a two-week Step-Reduction and a subsequent Return to Normal Daily Steps for two weeks

Group Type EXPERIMENTAL

Normal Daily Steps

Intervention Type BEHAVIORAL

Complete normal daily ambulation for one week

Step-Reduction

Intervention Type BEHAVIORAL

Reduce daily ambulation to fewer than 1000 steps per day for two weeks

Return to Normal Daily Steps

Intervention Type BEHAVIORAL

Increase daily ambulation to 100% of normal daily step-count for two weeks

Interventions

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Normal Daily Steps

Complete normal daily ambulation for one week

Intervention Type BEHAVIORAL

Step-Reduction

Reduce daily ambulation to fewer than 1000 steps per day for two weeks

Intervention Type BEHAVIORAL

Return to Normal Daily Steps

Increase daily ambulation to 100% of normal daily step-count for two weeks

Intervention Type BEHAVIORAL

Eligibility Criteria

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Inclusion Criteria

* Non-smoker

Exclusion Criteria

* Use of assistive walking devices
* Chronic use of analgesic or anti-inflammatory drugs
* History of neuromuscular problems or muscle and/or bone wasting disease
* Acute or chronic illness including cardiac, pulmonary, liver or kidney abnormalities, uncontrolled hypertension, insulin or non-insulin dependent diabetes or other metabolic disorders
* Daily use of statins, particularly simvastatin and atorvastatin
* Use of medications known to affect protein metabolism
* Normally complete fewer than 3000 steps per day
Minimum Eligible Age

65 Years

Maximum Eligible Age

80 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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Canadian Diabetes Association

OTHER

Sponsor Role collaborator

McMaster University

OTHER

Sponsor Role lead

Responsible Party

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Stuart Phillips

Professor

Responsibility Role PRINCIPAL_INVESTIGATOR

Locations

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Exercise Metabolism Research Laboratory, McMaster Univeristy

Hamilton, Ontario, Canada

Site Status

Countries

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Canada

References

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Breen L, Stokes KA, Churchward-Venne TA, Moore DR, Baker SK, Smith K, Atherton PJ, Phillips SM. Two weeks of reduced activity decreases leg lean mass and induces "anabolic resistance" of myofibrillar protein synthesis in healthy elderly. J Clin Endocrinol Metab. 2013 Jun;98(6):2604-12. doi: 10.1210/jc.2013-1502. Epub 2013 Apr 15.

Reference Type BACKGROUND
PMID: 23589526 (View on PubMed)

Devries MC, Breen L, Von Allmen M, MacDonald MJ, Moore DR, Offord EA, Horcajada MN, Breuille D, Phillips SM. Low-load resistance training during step-reduction attenuates declines in muscle mass and strength and enhances anabolic sensitivity in older men. Physiol Rep. 2015 Aug;3(8):e12493. doi: 10.14814/phy2.12493.

Reference Type BACKGROUND
PMID: 26265753 (View on PubMed)

McGlory C, von Allmen MT, Stokes T, Morton RW, Hector AJ, Lago BA, Raphenya AR, Smith BK, McArthur AG, Steinberg GR, Baker SK, Phillips SM. Failed Recovery of Glycemic Control and Myofibrillar Protein Synthesis With 2 wk of Physical Inactivity in Overweight, Prediabetic Older Adults. J Gerontol A Biol Sci Med Sci. 2018 Jul 9;73(8):1070-1077. doi: 10.1093/gerona/glx203.

Reference Type DERIVED
PMID: 29095970 (View on PubMed)

Other Identifiers

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0574

Identifier Type: -

Identifier Source: org_study_id

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