Hamstring/Quadriceps Ratio in CrossFit

NCT ID: NCT05500729

Last Updated: 2022-08-15

Basic Information

• Recruitment Status: UNKNOWN
• Total Enrollment: 60 participants
• Study Classification: OBSERVATIONAL
• Study Start Date: 2022-08-22
• Study Completion Date: 2022-12-20

Brief 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, 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.

Conditions

Healthy Volunteers

Study Design

• Observational Model Type: COHORT
• Study Time Perspective: CROSS_SECTIONAL

Study Groups

Female CrossFitters

Crossfit practitioners born as female

Hamstrings maximal voluntary isometric contraction.

Intervention Type: 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 contraction

Intervention Type: OTHER

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.

Male CrossFitters

Crossfit practitioners born as male

Hamstrings maximal voluntary isometric contraction.

Intervention Type: 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 contraction

Intervention Type: OTHER

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.

Interventions

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.

Intervention Type: OTHER

Quadriceps maximal voluntary isometric contraction

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.

Intervention Type: OTHER

Eligibility Criteria

Inclusion Criteria

• Regular members of Tuluka Fitness Palermo.
• With at least 1 year of Crossfit training.

Exclusion Criteria

• Subjects with a history of knee surgery.
• Who have any type of musculoskeletal injury to the dominant lower limb.
• Who suffer from neurological disorders.

• Minimum Eligible Age: 20 Years
• Maximum Eligible Age: 40 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

Camila Velo Etcheverry

OTHER

Sponsor Role: lead

Responsible Party

Camila Velo Etcheverry

PT Physiotherapy departament

Responsibility Role: SPONSOR_INVESTIGATOR

Locations

Maimonides University

Buenos Aires, Buenos Aires F.D., Argentina

Countries

Argentina

Central Contacts

Oscar Ronzio, DHSc PT

Role: CONTACT

ronzio.oscar@maimonides.edu

+54119051140

Other Identifiers

5738

Identifier Type: -

Identifier Source: org_study_id