Patellar TendinopathyNCT04204460
Electromyographic Evaluation of Quadriceps During Eccentric Decline Squat
An observational study of Patellar Tendinopathy, run by Ordu University at 1 site in Turkey (Türkiye).
Trial summary
Previous studies have generally investigated patellar tendon stiffness, cross-sectional area of patellar tendon, patellar tendon length, patellar force and patellafemoral forces during decline squat. Read more about this study
- Who is it for?
- Ages 18 years and olderHealthy volunteers can take part
- Conditions the study is for
- Patellar Tendinopathy
- How many people
- 20 participants
- Where
- 1 siteTurkey (Türkiye)
- Study dates
- 15 Dec 2019to 22 Dec 2019
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Study population: Asymptomathic older than 18 years, voluntary subjects who are students in a high school of physical education and sports.
Who may be able to join
- had exercised regularly (>3 days in a week) for at least six months.
- older than 18 years old.
Who cannot join
- had patellofemoral pain, knee pain otherwise unrelated to the knee extensor mechanism and other injuries that would restrict performance of the tasks (e.g. ankle pathology).
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Electromyographic Evaluation of Quadriceps During Eccentric Decline Squat: An Investigation of the Effect of Decline Angle and Arc of Motion
Previous studies have generally investigated patellar tendon stiffness, cross-sectional area of patellar tendon, patellar tendon length, patellar force and patellafemoral forces during decline squat. However, there is just a few study about electromyographic (EMG) activity during the eccentric squating, which is about rectus femoris (RF) recruitment. In the present study the investigators primarly aimed to quantify the activation of RF, vastus lateralis (VL), and vastus medialis obliqus (VMO) during eccentric squat on different decline angle (0, 5°, 10°, 15°, 20°). An additional purpose of our study was to compare the changes in muscle activation at various arc of knee flexion motion (degrees of 0-30, 30-60, 60-90, 0-60, 30-90, 0-90).The investigators hypothesised that the recruitment of RF, VL, and VMO during eccentric squat would differ according to decline angle and arc of motion.
Read the detailed description
The squat procedure in each condition will be repeated 10 times on a treadmill. The treadmill will be used to adjust the degree of decline in a standard manner. There will be a metronome to keep the speed of exercise in the same rhythm. All squats will be performed with a weighted barbell. The weight of it will be set as in ratio 30% of the participant's body weight
- Conditions
- Patellar Tendinopathy
- Keywords
- eccentric squatting, electromyografic activation, exercise, patellar tendinopathy
- Medical subject headings
- Motor Activity
What is being measured
The primary outcome is the main question the study is designed to answer.
Electromyographic measurement of muscle activation
Surface electromyographic (EMG) system (Noraxon Telemyo DTS System, Scottsdale, USA) will be use to measure the muscle activation ratios of RF, VL, and VMO. Electrodes will be placed according to Surface EMG for noninvasive assessment of muscles (SENIAM) recommendations on the dominant leg.
The muscle activation during eccentric phase of the decline squat for RF, VL, and VMO will be determined. The decline squat will be performed under different conditions (various decline angle: 0, 5, 10,15, 20 degree) The muscle activation will also be investigated within various arc of motion of knee flexion (0-30, 30-60, 60-90, 0-60, 0-90, 30-90) which is determined using the motion analysis system (Noraxon, MYOmotion Scottsdale, USA).
Measured: 50 minutes
Maximal voluntary isometric contractions (MVICs)
MVICs for the RF, VL, and VMO at their manual muscle test positions will be assessed within 3 trials, which lasts 5 seconds. The muscle test position will be standardized 90 degrees hip flexion and 60 degrees knee flexion. One minute a rest period will be between each trial. The peak EMG amplitude will be used for the normalization.
Measured: 5 minutes
Normalized EMG values
The amount of muscle activation in each condition will be proportioned to MVICs value for normalization using a calculator. The value will be represented in percentile (%).
Measured: 5 minutes
Secondary outcomes (2)
Weight
The participant's weight will be determined a weighing machine inkilogram.
Measured: 1 minute
Height
The participant's height will be measured in cm.
Measured: 1 minute
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted19 Dec 2019
- Study start15 Dec 2019 (estimated)
- Primary completion21 Dec 2019 (estimated)
- Study completion22 Dec 2019 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Patellar TendinopathyStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Case crossover
- Time perspective
- Prospective
- Enrolment
- 20 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Ordu University
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Sevim ACARÖZ CANDAN, Ordu University
- Investigators
- Sevim Acaröz Candan, PhD, Principal investigator, Ordu University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT04204460
- Sponsor's protocol ID
- OrduU6
- Status last verified
- Dec 2019
- First submitted
- 6 Dec 2019
- Last updated
- 19 Dec 2019
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Study at a glance
From the registry record, last updated by the sponsor on 19 Dec 2019. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Electromyographic Evaluation of Quadriceps During Eccentric Decline Squat: An Investigation of the Effect of Decline Angle and Arc of Motion
- ClinicalTrials.gov ID
- NCT04204460
- Acronym / sponsor ID
- OrduU6
- Conditions
- Patellar Tendinopathy
- Keywords
- eccentric squatting, electromyografic activation, exercise, patellar tendinopathy
- Study type
- Observational
- Recruitment status
- Unknown status
- Enrolment
- 20 participants (estimated)
- Lead sponsor
- Ordu UniversityUniversity, hospital or other
- Study start
- 15 Dec 2019 (estimated)
- Primary completion
- 21 Dec 2019 (estimated)
- Study completion
- 22 Dec 2019 (estimated)
- First posted
- 19 Dec 2019 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Previous studies have generally investigated patellar tendon stiffness, cross-sectional area of patellar tendon, patellar tendon length, patellar force and patellafemoral forces during decline squat. However, there is just a few study about electromyographic (EMG) activity during the eccentric squating, which is about rectus femoris (RF) recruitment. In the present study the investigators primarly aimed to quantify the activation of RF, vastus lateralis (VL), and vastus medialis obliqus (VMO) during eccentric squat on different decline angle (0, 5°, 10°, 15°, 20°). An additional purpose of our study was to compare the changes in muscle activation at various arc of knee flexion motion (degrees of 0-30, 30-60, 60-90, 0-60, 30-90, 0-90).The investigators hypothesised that the recruitment of RF, VL, and VMO during eccentric squat would differ according to decline angle and arc of motion.
Detailed description
The squat procedure in each condition will be repeated 10 times on a treadmill. The treadmill will be used to adjust the degree of decline in a standard manner. There will be a metronome to keep the speed of exercise in the same rhythm. All squats will be performed with a weighted barbell. The weight of it will be set as in ratio 30% of the participant's body weight
Study design
- Observational model
- Case crossover
- Time perspective
- Prospective
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
- Study population
- Asymptomathic older than 18 years, voluntary subjects who are students in a high school of physical education and sports.
Key inclusion criteria (2 listed)
- had exercised regularly (>3 days in a week) for at least six months.
- older than 18 years old.
Key exclusion criteria (1 listed)
- had patellofemoral pain, knee pain otherwise unrelated to the knee extensor mechanism and other injuries that would restrict performance of the tasks (e.g. ankle pathology).
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Primary outcome
Electromyographic measurement of muscle activation
Time frame: 50 minutes
Surface electromyographic (EMG) system (Noraxon Telemyo DTS System, Scottsdale, USA) will be use to measure the muscle activation ratios of RF, VL, and VMO. Electrodes will be placed according to Surface EMG for noninvasive assessment of muscles (SENIAM) recommendations on the dominant leg. The muscle activation during eccentric phase of the decline squat for RF, VL, and VMO will be determined. The decline squat will be performed under different conditions (various decline angle: 0, 5, 10,15, 20 degree) The muscle activation will also be investigated within various arc of motion of knee flexion (0-30, 30-60, 60-90, 0-60, 0-90, 30-90) which is determined using the motion analysis system (Noraxon, MYOmotion Scottsdale, USA).
Maximal voluntary isometric contractions (MVICs)
Time frame: 5 minutes
MVICs for the RF, VL, and VMO at their manual muscle test positions will be assessed within 3 trials, which lasts 5 seconds. The muscle test position will be standardized 90 degrees hip flexion and 60 degrees knee flexion. One minute a rest period will be between each trial. The peak EMG amplitude will be used for the normalization.
Normalized EMG values
Time frame: 5 minutes
The amount of muscle activation in each condition will be proportioned to MVICs value for normalization using a calculator. The value will be represented in percentile (%).
2 secondary outcomes
Weight
Time frame: 1 minute
Height
Time frame: 1 minute
Results and safety
Results are not available in the source record.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 19 Dec 2019.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Sevim Acaröz Candan, PhD principal investigator
Ordu University
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Patellar Tendinopathy, run by Ordu University at 1 site in Turkey (Türkiye).
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 2 inclusion and 1 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: status not confirmed, as of the sponsor's last update on 19 Dec 2019. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Turkey (Türkiye). Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
Results are not available in the source record.
How can a doctor refer a patient or contact the research team?
Contact Sevim Acaröz Candan, PhD (004522265200 ext. 6536, fzt_acaroz@hotmail.com), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Electromyographic measurement of muscle activation (time frame: 50 minutes). The study lists 3 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 19 Dec 2019.