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Can blood flow restriction boost muscle gains safely?

NCT ID NCT07404683

Knowledge-focused Sponsor: University of Valencia Source: ClinicalTrials.gov ↗

What the study statuses mean

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Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting This study
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study looks at how safe and effective an 8-week strength training program is when combined with blood flow restriction (BFR) — a technique that partially limits blood flow to the working muscles. Sixty healthy, untrained adults aged 18 to 65 will be randomly assigned to one of three groups: high-intensity exercise with BFR, low-intensity exercise with BFR, or high-intensity exercise without BFR. Researchers will measure muscle strength, size, and any side effects to see which approach works best.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 60 people

The number the study aims to enrol. It can still change while the study runs.

Expected to start

Sep 2026

An estimate. Start dates often move.

Expected to finish

Jun 2028

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 to 65 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Healthy, untrained adults * Age between 18 and 65 Exclusion Criteria: * Current participation in an upper limb strength training program * Presence of comorbidities that increase cardiovascular risk (uncontrolled ischemic heart disease, uncontrolled hypertension, diabetes, etc.) * Patients with more than one thromboembolism risk factor (obesity, history of thrombosis, prolonged immobilization, recent surgery, use of contraceptives, etc.) * Current diagnosis of any pathology affecting the cervical spine, shoulder, and/or thoracic spine * History of surgery in the last year * Use of ergogenic aids or medications that affect muscle metabolism (anabolic steroids, testosterone, creatine, protein supplements, corticosteroids, chronic use of nonsteroidal anti-inflammatory drugs, etc.)

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Conditions

The condition(s) this trial relates to.

Motor Activity

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Healthy adult

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  2. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

More trials for these conditions

Other studies related to the condition(s) this trial covers.