Red light may cut injury risk, study says
NCT ID NCT07477678
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study looks at whether shining red and near-infrared light on the legs can improve ankle and hamstring flexibility, which may lower the chance of sports injuries. Forty healthy university students will try three things: no treatment, a 10-minute bike warm-up, or 10 minutes of red light therapy. Their flexibility will be measured before and after each session to see if the light helps.
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Study facts
What this study's own registry entry says, in plain language.
- Phase
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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
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About 40 people
The number the study aims to enrol. It can still change while the study runs.
- Expected to start
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Mar 2026
An estimate. Start dates often move.
- Expected to finish
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Apr 2026
An estimate. End dates often move.
- Lead sponsor
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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
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Children (under 18), adults (18 to 64) and older adults (65 and over)
- Sex
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Anyone
- Healthy volunteers
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Accepted
You do not need to have the condition being studied to take part.
Show the full entry requirements Hide 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: * Active and healthy university students * No current pain or injury in the lower limbs * Ability to perform the Knee-to-Wall Test (KWT) and Active Knee Extension Test (AKET) * Availability to attend all three sessions with at least 72 hours between assessments * Signed informed consent Exclusion Criteria: * Use of photosensitizing medication currently or within the past 3 weeks (as collected in the medical questionnaire) * Recent musculoskeletal injury of the lower limbs or any sports-related injury with relevant downtime * Presence of pain, joint limitation, or any medical condition preventing safe performance of KWT or AKET
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As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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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
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Human Movement Laboratory, Escola Superior de Saúde da Universidade de Aveiro (ESSUA)
Aveiro, Aveiro District, 3810-193, Portugal
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