Healthy VolunteersHQCROSSNCT05500729
Hamstring/Quadriceps Ratio in CrossFit
An observational study of Healthy Volunteers, run by Camila Velo Etcheverry at 1 site in Argentina.
Trial summary
Crossfit® is a high-intensity physical training plan based on a program that includes exercises such as running, weight lifting and gymnastic movements. It focuses on the development of 10 physical qualities: strength, balance, cardiovascular and respiratory endurance, coordination, power, flexibility, agility, speed… Read more about this study
- Who is it for?
- Ages 20 to 40 yearsHealthy volunteers can take part
- Conditions the study is for
- Healthy Volunteers
- What is being tested?
- Hamstrings maximal voluntary isometric contraction. and Quadriceps maximal voluntary isometric contraction
- How many people
- 60 participants
- Where
- 1 siteArgentina
- Study dates
- 22 Aug 2022to 20 Dec 2022
- 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 20 to 40 years
- All sexes
- Healthy volunteers accepted
- Adult
Study population: The study population will consist of regular members of Tuluka Fitness Palermo, of both sex between 20 and 40 years of age, who have been training for more than 1 year on a recreational basis.
Who may be able to join
- Regular members of Tuluka Fitness Palermo.
- With at least 1 year of Crossfit training.
Who cannot join
- Subjects with a history of knee surgery.
- Who have any type of musculoskeletal injury to the dominant lower limb.
- Who suffer from neurological disorders.
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Evaluation of Isometric Strength and Hamstring/Quadriceps Ratio in Healthy CrossFit Subjects
Crossfit® is a high-intensity physical training plan based on a program that includes exercises such as running, weight lifting and gymnastic movements. It focuses on the development of 10 physical qualities: strength, balance, cardiovascular and respiratory endurance, coordination, power, flexibility, agility, speed, precision and muscular endurance.Unfortunately, research on its effects is still at the beginning. The time of each session is one hour, which is divided into a warm-up of 10-30 minutes, strength training or skills, endurance work and finally a recovery phase, mobility and stretching. These types of exercises are incorporated into group training sessions called Workout of The Day (WOD).
Muscular strength is the action produced by a muscle or muscle group against resistance. It is one of the fundamental physical qualities for activities of daily living.
Read more
Digital isometric dynamometry is a tool to evaluate maximum voluntary isometric contraction (MVIC).
Hamstring muscles are responsible for hip extension and knee flexion. Moreover, they are the main protectors against anterior knee subluxation due to their action in conjunction with the anterior cruciate ligament (ACL).The quadriceps is one of the largest and most powerful muscles of the human body.
The ratio between hamstrings and quadriceps muscles has a strong correlation with lower limb injuries. This ratio, known as "H:Q" has proved to be the most reliable indicator to quantify a neuromuscular decompensation that causes an injury and, in addition, it is used as a prognostic indicator.
- Conditions
- Healthy Volunteers
- Being tested
- Hamstrings maximal voluntary isometric contraction., Quadriceps maximal voluntary isometric contraction
- Keywords
- Healthy Volunteers, Muscle Strength, Hamstring Muscles, Quadriceps Muscles, Young Adult, Isometric Contraction, Muscle Strength Dynamometer, Human physical conditioning
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Hamstrings maximal voluntary isometric contraction.Other
Hamstrings maximal voluntary isometric contraction (MVIC) will be measured with an isometric dynamometer (3 reps x 5 sec work x 10 sec rest). The best rep will be used. Whenever the third one was the best, additional measurements will be taken until a decrease in torque will be obtained to determine the maximum.
Quadriceps maximal voluntary isometric contractionOther
Quadriceps maximal voluntary isometric contraction (MVIC) will be measured with an isometric dynamometer (3 reps x 5 sec work x 10 sec rest). The best rep will be used. Whenever the third one was the best, additional measurements will be taken until a decrease in torque will be obtained to determine the maximum.
| Study group | Role | What they receive |
|---|---|---|
| Female CrossFitters | Crossfit practitioners born as female Receives: Other: Hamstrings maximal voluntary isometric contraction.; Other: Quadriceps maximal voluntary isometric contraction | |
| Male CrossFitters | Crossfit practitioners born as male Receives: Other: Hamstrings maximal voluntary isometric contraction.; Other: Quadriceps maximal voluntary isometric contraction |
What is being measured
The primary outcome is the main question the study is designed to answer.
Hamstrings maximal voluntary isometric contraction
Hamstrings force generated by the patient during a maximal voluntary isometric contraction, measured by an isometric dynamometer with load cell and computer interface.
The best of the 3 repetitions will be considered. Whenever the third one is the best, additional measurements will be taken until a decrease in torque is obtained in order to determine the maximum.
Unit: Newtons
Measured: Day 1
Quadriceps maximal voluntary isometric contraction.
Quadriceps force generated by the patient during a maximal voluntary isometric contraction, measured by an isometric dynamometer with load cell and computer interface.
The best of the 3 repetitions will be considered. Whenever the third one was the best, additional measurements will be taken until a decrease in torque is obtained in order to determine the maximum.
Unit: Newtons
Measured: Day 1
Secondary outcomes (1)
Hamstring / Quadriceps Ratio
The ratio between hamstrings and quadriceps muscles has a strong correlation with lower limb injuries. This ratio, known as "H:Q" has proved to be the most reliable indicator to quantify a neuromuscular decompensation that causes an injury and, in addition, it is used as a prognostic indicator.
Minimum value: -1 Maximum value: 1 A value below 0.6 indicates risk of injury.
Measured: Day 1
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted15 Aug 2022
- Study start22 Aug 2022 (estimated)
- Primary completion1 Nov 2022 (estimated)
- Study completion20 Dec 2022 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Healthy VolunteersStudies 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
- Cohort
- Time perspective
- Cross-sectional
- Enrolment
- 60 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Camila Velo Etcheverry
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor-investigator, Camila Velo Etcheverry, Maimonides University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT05500729
- Sponsor's protocol ID
- 5738
- Acronym
- HQCROSS
- Status last verified
- Aug 2022
- First submitted
- 8 Aug 2022
- Last updated
- 15 Aug 2022
- Results posted
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
Study at a glance
From the registry record, last updated by the sponsor on 15 Aug 2022. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Evaluation of Isometric Strength and Hamstring/Quadriceps Ratio in Healthy CrossFit Subjects
- ClinicalTrials.gov ID
- NCT05500729
- Acronym / sponsor ID
- HQCROSS / 5738
- Conditions
- Healthy Volunteers
- Keywords
- Healthy Volunteers, Muscle Strength, Hamstring Muscles, Quadriceps Muscles, Young Adult, Isometric Contraction, Muscle Strength Dynamometer, Human physical conditioning
- Study type
- Observational
- Recruitment status
- Unknown status
- Enrolment
- 60 participants (estimated)
- Lead sponsor
- Camila Velo EtcheverryUniversity, hospital or other
- Study start
- 22 Aug 2022 (estimated)
- Primary completion
- 1 Nov 2022 (estimated)
- Study completion
- 20 Dec 2022 (estimated)
- First posted
- 15 Aug 2022 (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.
Crossfit® is a high-intensity physical training plan based on a program that includes exercises such as running, weight lifting and gymnastic movements. It focuses on the development of 10 physical qualities: strength, balance, cardiovascular and respiratory endurance, coordination, power, flexibility, agility, speed, precision and muscular endurance.Unfortunately, research on its effects is still at the beginning. The time of each session is one hour, which is divided into a warm-up of 10-30 minutes, strength training or skills, endurance work and finally a recovery phase, mobility and stretching. These types of exercises are incorporated into group training sessions called Workout of The Day (WOD).
Muscular strength is the action produced by a muscle or muscle group against resistance. It is one of the fundamental physical qualities for activities of daily living.
Digital isometric dynamometry is a tool to evaluate maximum voluntary isometric contraction (MVIC).
Hamstring muscles are responsible for hip extension and knee flexion. Moreover, they are the main protectors against anterior knee subluxation due to their action in conjunction with the anterior cruciate ligament (ACL).The quadriceps is one of the largest and most powerful muscles of the human body.
The ratio between hamstrings and quadriceps muscles has a strong correlation with lower limb injuries. This ratio, known as "H:Q" has proved to be the most reliable indicator to quantify a neuromuscular decompensation that causes an injury and, in addition, it is used as a prognostic indicator.
Study design
- Observational model
- Cohort
- Time perspective
- Cross-sectional
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Female CrossFitters | – | Other: Hamstrings maximal voluntary isometric contraction., Other: Quadriceps maximal voluntary isometric contractionCrossfit practitioners born as female |
| Male CrossFitters | – | Other: Hamstrings maximal voluntary isometric contraction., Other: Quadriceps maximal voluntary isometric contractionCrossfit practitioners born as male |
Who may qualify
- Ages
- 20 to 40 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult
- Study population
- The study population will consist of regular members of Tuluka Fitness Palermo, of both sex between 20 and 40 years of age, who have been training for more than 1 year on a recreational basis.
Key inclusion criteria (2 listed)
- Regular members of Tuluka Fitness Palermo.
- With at least 1 year of Crossfit training.
Key exclusion criteria (3 listed)
- Subjects with a history of knee surgery.
- Who have any type of musculoskeletal injury to the dominant lower limb.
- Who suffer from neurological disorders.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Hamstrings maximal voluntary isometric contraction.Hamstrings maximal voluntary isometric contraction (MVIC) will be measured with an isometric dynamometer (3 reps x 5 sec work x 10 sec rest). The best rep will be used. Whenever the third one was the best, additional measurements will be taken until a decrease in torque will be obtained to determine the maximum. | Other | Female CrossFitters, Male CrossFitters |
| Quadriceps maximal voluntary isometric contractionQuadriceps maximal voluntary isometric contraction (MVIC) will be measured with an isometric dynamometer (3 reps x 5 sec work x 10 sec rest). The best rep will be used. Whenever the third one was the best, additional measurements will be taken until a decrease in torque will be obtained to determine the maximum. | Other | Female CrossFitters, Male CrossFitters |
Primary outcome
Hamstrings maximal voluntary isometric contraction
Time frame: Day 1
Hamstrings force generated by the patient during a maximal voluntary isometric contraction, measured by an isometric dynamometer with load cell and computer interface. The best of the 3 repetitions will be considered. Whenever the third one is the best, additional measurements will be taken until a decrease in torque is obtained in order to determine the maximum. Unit: Newtons
Quadriceps maximal voluntary isometric contraction.
Time frame: Day 1
Quadriceps force generated by the patient during a maximal voluntary isometric contraction, measured by an isometric dynamometer with load cell and computer interface. The best of the 3 repetitions will be considered. Whenever the third one was the best, additional measurements will be taken until a decrease in torque is obtained in order to determine the maximum. Unit: Newtons
1 secondary outcome
Hamstring / Quadriceps Ratio
Time frame: Day 1
Results and safety
Results are not available in the source record.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 15 Aug 2022.
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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.
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 Healthy Volunteers, run by Camila Velo Etcheverry at 1 site in Argentina.
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 3 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 15 Aug 2022. 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 Argentina. 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 Oscar Ronzio, DHSc PT (+54119051140, ronzio.oscar@maimonides.edu), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Hamstrings maximal voluntary isometric contraction (time frame: Day 1). The study lists 2 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 15 Aug 2022.