The Effects of Age on Muscle Endurance During Resistance Exercise With and Without Blood Flow Restriction

NCT ID: NCT07090603

Last Updated: 2025-07-29

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

NOT_YET_RECRUITING

Clinical Phase

NA

Total Enrollment

20 participants

Study Classification

INTERVENTIONAL

Study Start Date

2025-09-30

Study Completion Date

2026-04-30

Brief Summary

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The purpose of this study is to learn how aging affects muscle endurance during resistance exercise, and how oxygen delivery to the muscles plays a role in these changes. To answer this question, we are comparing how many repetitions of a leg exercise (knee extensions) younger and older adults can do at different exercise intensities. We will also look at how the muscles use oxygen during these exercises.

Participants will take part in 12 different exercise sessions. In each session, they will perform as many knee extensions as possible using different amounts of weight-consisting of 20%, 30%, 40%, 50%, 60% and 70% of the maximum weight they can lift one time. Each weight will be tested both with and without a cuff on the leg that temporarily reduces blood flow to the muscle.

Detailed Description

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Conditions

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Ageing Muscle Fatigue Caused by Repetitive Muscle Exercise

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

SINGLE_GROUP

Primary Study Purpose

BASIC_SCIENCE

Blinding Strategy

NONE

Study Groups

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Young cohort

Young, healthy participants aged 19-35 will perform maximum repetitions of knee extension exercise at 20%, 30%, 40%, 50%, 60% and 70% of their one rep max with and without blood flow occlusion.

Group Type EXPERIMENTAL

Knee extension exercise

Intervention Type OTHER

Maximum repetitions of knee extension exercise at 20%, 30%, 40%, 50%, 60% and 70% of participants one rep max with and without blood flow occlusion

Older cohort

Older, healthy participants aged 65 years and up will perform maximum repetitions of knee extension exercise at 20%, 30%, 40%, 50%, 60% and 70% of their one rep max with and without blood flow occlusion.

Group Type EXPERIMENTAL

Knee extension exercise

Intervention Type OTHER

Maximum repetitions of knee extension exercise at 20%, 30%, 40%, 50%, 60% and 70% of participants one rep max with and without blood flow occlusion

Interventions

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Knee extension exercise

Maximum repetitions of knee extension exercise at 20%, 30%, 40%, 50%, 60% and 70% of participants one rep max with and without blood flow occlusion

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

* Able to understand and communicate in English
* 19-35 years of age
* 65 years of age or older
* All "No" answers on the CSEP Get Active questionnaire or doctors' approval to participate

Exclusion Criteria

* BMI lower than 18 or greater than 32
* Current use of cigarettes or other nicotine devices
* Any major uncontrolled cardiovascular, muscular, metabolic, and/or neurological disorders
* Any medical condition impacting the ability to participate in maximal exercise
* Type one or type two diabetes
* Diagnosis of cancer or undergoing cancer treatment in the past 12 months
* Taking blood-thinning medication or the presence of a bleeding disorder
* Drug therapy with any drugs that alter skeletal muscle metabolism (i.e., Metformin, Benzodiazepines)
* Lowest calculated exercise testing load is less than the lightest weight able to be provided by the lab gymnasium equipment
* In the past six months, completing more than 300 minutes of moderate physical activity or 150 minutes of vigorous physical activity per week
* In the past six months, completing less than 150 minutes of moderate physical activity or 75 minutes of vigorous physical activity
Minimum Eligible Age

19 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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University of British Columbia

OTHER

Sponsor Role lead

Responsible Party

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Cameron Mitchell

Associate Professor

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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Cameron J Mitchell, PhD (Kinesiology)

Role: PRINCIPAL_INVESTIGATOR

University of British Columbia

Locations

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Chan Gunn Pavilion

Vancouver, British Columbia, Canada

Site Status

Countries

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Canada

Central Contacts

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Abaigeal L Kelso

Role: CONTACT

6138626994

Other Identifiers

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H25-01532

Identifier Type: -

Identifier Source: org_study_id

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