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Dumbbells vs. machines: which builds muscle better?

NCT ID NCT07495540

Knowledge-focused Sponsor: Biruni University Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study will compare the effects of free weight exercises (like dumbbells and barbells) versus weight machines on muscle strength and endurance. Twenty-six inactive adults aged 18-30 will be assigned to one of two groups and train three times a week for eight weeks. The goal is to see which method leads to better muscle gains and neuromuscular control.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Resistance exercise (free weights vs. weight machines)
What this could lead to
If successful, this could help people choose the most effective type of strength training for building muscle and improving control.
What could go wrong
This is a small, early-stage study with only 26 participants, so results may not apply to everyone. It compares two common methods, so no major breakthroughs are expected.

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 26 people

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

Expected to start

Mar 2026

An estimate. Start dates often move.

Expected to finish

Jun 2026

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 30 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: * Being an individual between the ages of 18-30 years * Being physically inactive according to the International Physical Activity Questionnaire short form (\<600 MET-min/week) * Residing in Istanbul * Voluntary participation in the study. Exclusion Criteria: * Having a neurological or cardiopulmonary system problem that prevents exercise. * Having mental dysfunction. * Having an acute musculoskeletal injury which limits exercise participant * Being pregnant. * Having answered "YES" to any question on the Exercise Readiness Questionnaire.

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As listed by the trial registrant

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

Adult MUSCLE Neuromuscular adaptations Resistance exercise

How to take part

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

  1. The places running it

    1 site. The list below names each one and where it is.

  2. 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 ↗

  3. 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.

Contacts and locations

Locations

  • Biruni University

    Istanbul, Zeytinburnu, 34015, Turkey (Türkiye)

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