Hamstring/Quadriceps Ratio in CrossFit

Healthy Volunteers Clinical Trial

— HQCROSS  

Official title:

Evaluation of Isometric Strength and Hamstring/Quadriceps Ratio in Healthy CrossFit Subjects

Clinical Trial Details — Status: Not yet recruiting

Administrative data

• NCT number: NCT05500729
• Other study ID #: 5738
• Status: Not yet recruiting
• Start date: August 22, 2022
• Est. completion date: December 20, 2022

Study information

• Verified date: August 2022
• Source: Maimonides University
• Contact: Oscar Ronzio, DHSc PT
• Phone: +54119051140
• Email: ronzio.oscar[@]maimonides.edu
• Is FDA regulated: No
• Study type: Observational

Clinical 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, 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.

Recruitment information / eligibility

• Status: Not yet recruiting
• Enrollment: 60
• Est. completion date: December 20, 2022
• Est. primary completion date: November 1, 2022
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: All
• Age group: 20 Years to 40 Years

Eligibility

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.

Related Conditions & MeSH terms

• Healthy Volunteers

Intervention

Other:
• 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.
• 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.

Locations

Country	Name	City	State
Argentina	Maimonides University	Ciudad Autonoma de Buenos Aires	Caba

Sponsors (1)

Lead Sponsor	Collaborator
Camila Velo Etcheverry

Country where clinical trial is conducted

Argentina, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	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	Day 1
Primary	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	Day 1
Secondary	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.	Day 1