Simple 5-Second hold may supercharge leg strength gains
NCT ID NCT07667543
First seen Jun 27, 2026 · Last updated Jul 01, 2026 · Updated 2 times
Summary
This study tested whether adding a 5-second hold at the end of each leg-extension exercise boosts thigh muscle strength more than doing the exercise without the hold. Forty-three healthy, sedentary adults did leg lifts 3 days a week for 8 weeks. Researchers measured their leg strength and thigh size before and after the program to see if the extra hold made a difference.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- Isotonic knee-extension exercise with added isometric hold
- What this could lead to
- If it works, this could show that a simple tweak to leg exercises—adding a short hold—builds thigh strength faster, helping people get stronger in less time.
- What could go wrong
- This is a small, completed study in healthy, sedentary adults. Results may not apply to athletes or people with knee problems, and the strength gains might be modest.
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
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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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43 people
The number who actually took part.
- Started
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Dec 2014
- Finished
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Jul 2015
- 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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18 to 40 years
- 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: * Age 18-40 years * Sedentary lifestyle (low physical activity level) * Healthy individuals with no known knee-related disability Exclusion Criteria: * Musculoskeletal problems of the lower extremity * History of lower extremity surgery or significant trauma * Low back pain and/or lumbar region problems * Cardiac complaints * Neurological complaints * Chronic systemic disease (e.g., diabetes mellitus, rheumatologic conditions)
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As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Sportomed | Physical Therapy and Rehabilitation Center
Istanbul, Bostancı/Kadıköy, 34744, Turkey (Türkiye)