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Workout your good arm to save the injured one? small study shows promise

NCT ID NCT05810129

Disease control Sponsor: Universidad de La Frontera 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 pilot study tested whether training the uninjured arm during the 8-week immobilization period after clavicle surgery could help preserve muscle mass and strength in the injured arm. Nineteen physically active men aged 18-40 participated. One group did strength training with their uninjured arm while the other received standard physical therapy. The results suggest cross-education may reduce muscle loss, but larger studies are needed to confirm.

What this could mean

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

Active substance
concentric-eccentric strength training (unilateral resistance training of the uninjured arm)
What this could lead to
If it works, this approach could help people recovering from shoulder injuries maintain muscle and strength without exercising the injured arm.
What could go wrong
This is a very small pilot study with only 19 male participants, so results may not apply to women or larger groups. The effect on long-term recovery is still uncertain.

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

19 people

The number who actually took part.

Started

Oct 2023

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

18 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: (i) male sex, (ii) age 18-40 years (iii), surgically treated mid-clavicular fracture, (iv) body mass index 18.5-30.0 kg/m2, and (v) physically active status. The study focused on male participants to minimize variability related to sex-specific neuromuscular and morphological responses Exclusion Criteria: (i) previous upper-limb fractures or polytrauma, (ii) surgical delay \>12 days, (iii) cardiovascular conditions contraindicating exercise, (iv) uncontrolled comorbidities, (v) neurological injury, (vi) smoking, and (vii) use of nutritional supplements known to affect muscle metabolism (i.e., creatine, leucine, glutamine, casein, whey protein, fatty acids, etc.). \-

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As listed by the trial registrant

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

Clavicle fracture

Contacts and locations

Locations

  • Universidad de La Frontera

    Temuco, IX Región de La Araucanía, 4780000, Chile

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