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Anthropometric Normalization in Inter-Individual Variability of Comprehensive Isokinetic Strength Assessment

— Observational Healthy

For patients and families

In plain language

An automatic summary of structured registry data. It is an orientation aid, not a substitute for the official protocol or a physician assessment.

What is being studied
The protocol lists: effects of BW versus BMI normalization on inter-individual variability of trunk, hip, and knee muscle strength in healthy female.
Who it may be relevant to
Registry conditions: Healthy. Basic parameters: 25 years — 35 years · Female.
What needs checking
Age, condition and sex are only basic indicators. Prior treatment, laboratory values and other mandatory requirements appear in the eligibility criteria below.
Where it takes place
Egypt
Next step
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Official title

Role of Anthropometric Normalization in Inter-Individual Variability of Comprehensive Isokinetic Strength Assessment in Healthy Women: A Methodological Study

Overview

Accurate normalization of peak torque (PT) is critical for comparing muscle strength across individuals of varying body composition. While body weight (BW) is commonly used, body mass index (BMI) may provide a more stable representation of inter-individual variability. The study aims to compare the effects of BW and BMI normalization on inter-individual variability of trunk, hip, and knee muscle strength in healthy female participants.

Detailed description

Accurate normalization of peak torque (PT) is critical for comparing muscle strength across individuals of varying body composition. While body weight (BW) is commonly used, body mass index (BMI) may provide a more stable representation of inter-individual variability. The study aims to compare the effects of BW and BMI normalization on inter-individual variability of trunk, hip, and knee muscle strength in healthy female participants.

Thirty healthy adult females will undergo isokinetic testing of trunk flexors/extensors, hip flexors/extensors/abductors/adductors, and knee flexors/extensors. PT values will be normalized to BW and BMI. Coefficient of variation (CV%) will be calculated for each method to evaluate relative variability.

Interventions

  • Diagnostic test effects of BW versus BMI normalization on inter-individual variability of trunk, hip, and knee muscle strength in healthy female
    effects of BW and BMI normalization on inter-individual variability of trunk, hip, and knee muscle strength in healthy female

Primary outcome measures

  • trunk muscle peak torque [Time frame: two weeks]
  • hip muscle peak torque [Time frame: two weeks]

Eligibility criteria

Inclusion criteria

  • he absence of any current or prior musculoskeletal injury or pain affecting the trunk, pelvis, or lower extremities within the preceding six months.
  • absence of neurological, cardiovascular, or systemic conditions that could influence muscle strength or motor performance.
  • a normal BMI relative to their age and sex and were recreationally active without engaging in any structured strength training program targeting the trunk or hip muscles during the three months preceding the study.
  • all participants were able to comprehend the study procedures and provide written informed consent.

Exclusion criteria

  • any history of musculoskeletal injury, surgery, or chronic pain involving the spine, pelvis, hip, knee, or ankle. Individuals with diagnosed neurological disorders, balance impairments, or vestibular conditions were also ineligible.
  • cardiovascular, respiratory, or systemic diseases that could affect physical performance or muscle strength were excluded
  • a prior history of lower limb or trunk fractures. Individuals engaged in competitive sports or structured resistance training programs targeting the trunk and lower limb muscles within the preceding three months were not included.
  • musculoskeletal deformities, leg length discrepancies, or any other condition that could interfere with the testing procedures

Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.

Healthy volunteers: Yes

Study design

Observational model
Other

Study locations

Egypt · 1 center
  • Faculty of Physical Therapy, Cairo University — Giza

Identifiers

NCT: NCT07508150 · Approved by IRB

Primary sources (government registries)

View this study on ClinicalTrials.gov ↗