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Free weights vs machines: which really works your chest more?

NCT ID NCT07539337

Knowledge-focused Sponsor: Nihat Sarıalioğlu 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
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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 looked at how two common chest exercises—bench press and machine chest press—change the stiffness and tone of the chest muscle right after exercise. Sixteen male bodybuilders did either bench press or machine chest press at the same intensity. The goal was to see which exercise causes more muscle stiffness or tone changes. Results help understand how different exercises affect muscles, but no treatment or health outcome was tested.

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

16 people

The number who actually took part.

Started

Jan 2025

Finished

Dec 2025

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

20 to 40 years

Sex

Male participants only

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: * Male participants * Aged between 20 and 40 years * Minimum of 5 years of regular resistance training experience * Competitive bodybuilding athletes Exclusion Criteria: * History of musculoskeletal injury affecting the pectoralis major, shoulder, or upper extremity within the last 12 months * History of upper extremity surgery * Use of anabolic steroids or performance-enhancing substances within the last 12 months

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As listed by the trial registrant

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

Muscle mechanical properties Resistance training

Contacts and locations

Locations

  • Giresun University - Sports Science Faculty

    Giresun, Centre, 28100, Turkey (Türkiye)

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