Impact of Knee Extension Brace on Quadriceps EMG During ASLR

NCT06821477 | Active Not Recruiting

• 1 other identifier: EMG_brace
• Study Type: observational
• Target: 20
• Locations: 1 country
• Sites: 1

Brief Summary

The main objective of this study is to evaluate quadriceps thigh muscle activity during active straight leg raise (ASLR) with a knee brace. An additional aim of the study is to evaluate quadriceps activity during straight leg raise with a knee brace in a variable command and manner of task performance. The study will be conducted on a group of healthy individuals aged 18 - 35 years. Height and weight were measured using a scale and centimetre tape. Then, according to the study protocol, specific measurements will be taken of the rectus femoris, medial vastus and lateral vastus muscles using surface EMG of a non-invasive nature. Study participants will undergo the following measurements:

1. 1.Measurement of the MVIC (maximum voluntary isometric contraction) of the quadriceps of the thigh, in a sitting position with the lower leg flexed to 90 degrees and in knee extended (0 degrees).
2. 2.Measurement of muscle activity during elevation of the straightened lower limb in a supine position without an orthosis.
3. 3.Measurement of muscle activity during straight leg raise in supine position with knee brace (default and different commends).

Conditions

EMG; Exercise Response

Outcome Measures

Primary Outcomes (1)

• Comparison between RF from p1 (ASLR without orthosis) to RF from p2 (ASLR with orthosis, without any command)

  It was decided to choose RF and generalize it to whole quadriceps femoris, thus decide what is the impact of the extension brace on EMG quadriceps signal

  through study completion, an average of 1 year

Secondary Outcomes (1)

• Muscle (RF, VLO, VMO) comparison between trials and inside every trial

  through study completion, an average of 1 year

Other Outcomes (1)

• Comparison between analysis made with normalization to MVIC done in 90 degrees (standard) and done in 0 degrees (full extension).

  through study completion, an average of 1 year

Study Arms (1)

20 healthy young people

* age between 18-35 years * no contraindications to exercise * ability to perform the required commands without pain or discomfort * full range of motion of the knee joint.

Other: Superficial EMG

Interventions

Superficial EMG OTHER

Superfiscial EMG during ASLR without knee brace follow by EMG during ASLR with knee brace under certain commands

20 healthy young people

Eligibility Criteria

• Age: 18 Years - 35 Years
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64)
• Sampling Method: Non-Probability Sample

Study Population

young healthy people 18-35 years old

You may qualify if:

• age between 18-35 years
• no contraindications to exercise
• ability to perform the required commands without pain or discomfort
• full range of motion of the knee joint.

You may not qualify if:

• those with a history of knee and/or hip surgery
• damage to ligamentous structures of the knee joint in the past treated conservatively or meniscus treated conservatively.
• muscle and tendon injury of the knee joint area in the past 3 months.

Sponsors & Collaborators

• Józef Piłsudski University of Physical Education: lead

Study Sites (1)

Jozef Pilsudski University of Physical Education

Warsaw, 01-813, Poland

Location

Study Design

• Study Type: observational
• Observational Model: COHORT
• Time Perspective: CROSS SECTIONAL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: MSc PT

Study Record Dates

• First Submitted: February 3, 2025
• First Posted: February 12, 2025
• Study Start: February 3, 2025
• Primary Completion: October 31, 2025
• Study Completion: December 31, 2025
• Last Updated: July 18, 2025

Record last verified: 2025-07

Data Sharing

• IPD Sharing: Will share
• Shared Documents: SAP, CSR
• Access Criteria: Raw EMG data are available on reasonable request. We request investigators to contact us directly to discuss data sharing. On reasonable request statistical protocol and code for R or Python are available.

Locations

PL (1)