Establishing reference values for knee muscle strength in Brazilians
Reference Values for the One Repetition Maximum Test (1RM) of Knee Extensors for Brazilians.
This study is testing how strong the knee muscles are in healthy Brazilians to create standard guidelines that can help in fitness and health settings.
Quick facts
| Study type | Observational |
|---|---|
| Enrollment | 72 (estimated) |
| Ages | 18 Years to 80 Years |
| Sex | All |
| Sponsor | Universidade Estadual de Londrina Academic / other |
| Locations | 1 site (Londrina, Paraná) |
| Trial ID | NCT06648421 on ClinicalTrials.gov |
What this trial studies
This observational study aims to establish standardized reference values for the one-repetition maximum (1RM) test of knee extensors among healthy Brazilians. It consists of two phases: a pilot study to determine the optimal starting load for the 1RM attempts, followed by a main study that will utilize the developed protocol to assess knee extensor strength. Participants will undergo evaluations that include anthropometric data, comorbidities, physical activity levels, and cognitive screening, alongside the 1RM test. The goal is to create reliable reference equations for knee extensor strength that can be used in clinical and fitness settings.
Who should consider this trial
Good fit: Ideal candidates for this study are healthy individuals aged 18-80 years without any conditions that could affect muscle strength assessment.
Not a fit: Patients with orthopedic, neuromuscular, or cardiorespiratory conditions that limit their ability to perform the 1RM test will not benefit from this study.
Why it matters
Potential benefit: If successful, this study could provide standardized reference values that enhance the assessment and prescription of resistance training for individuals.
How similar studies have performed: While similar studies have been conducted, this specific approach to establish reference values for knee extensors using the 1RM test is relatively novel.
Eligibility criteria
Show full inclusion / exclusion criteria
Inclusion Criteria: * Individuals aged between 18-80 years of both sexes; * Absence of any condition (e.g., orthopedic, neuromuscular, cardiorespiratory) that may limit the assessment or directly interfere in its results. Exclusion Criteria: * Failure to complete the proposed assessments for any reason; * A score on the Mini-Mental State Examination lower than18 for illiterate individuals and lower than 24 for literate individuals; * Body mass index (BMI) lower than 18 kg/m2 and higher than 40 kg/m2; * The manifestation of the desire to leave the study at any time for any reason.
Where this trial is running
Londrina, Paraná
- Health Sciences Center of the State University of Londrina — Londrina, Paraná, Brazil (Recruiting)
Study contacts
- Principal investigator: Fabio O Pitta, PhD — State University of Londrina
- Study coordinator: Fabio O Pitta, PhD
- Email: fabiopitta@uel.br
- Phone: +5543991015480
How to participate
- Review the eligibility criteria above with your treating physician.
- Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
- Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.