Hamstring/Quadriceps Ratio in CrossFit

• Conditions: Healthy Volunteers

• Registration Number: NCT05500729
• Lead Sponsor: Camila Velo Etcheverry

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.

Detailed Description

Not available

Study Timeline

• Status Verified: 2022-08
• Study First Submitted: 2022-08-08
• Study First Submitted QC: 2022-08-11
• Last Update Submitted: 2022-08-11
• Study First Posted: 2022-08-15
• Last Update Posted: 2022-08-15
• Study Start: 2022-08-22
• Primary Completion: 2022-11-01
• Study Completion: 2022-12-20

Recruitment & Eligibility

• Status: UNKNOWN
• Sex: All
• Target Recruitment: 60

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.

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Hamstrings maximal voluntary isometric contraction	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.	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

Secondary Outcome Measures

Name	Time	Method
Hamstring / Quadriceps Ratio	Day 1	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.

Trial Locations

Locations (1)

Maimonides University; 🇦🇷 Ciudad Autonoma de Buenos Aires, Caba, Argentina