Hamstring/Quadriceps Ratio in CrossFit (HQCROSS)

Camila Velo Etcheverry

Status: Not yet enrolling

Conditions: Healthy Volunteers

Treatments: Other: Hamstrings maximal voluntary isometric contraction.; Other: Quadriceps maximal voluntary isometric contraction

Study type: Observational

Funder types: Other

Identifiers

NCT05500729

5738

Details and patient eligibility

About

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.

Enrollment: 60 estimated patients

Sex: All

Ages: 20 to 40 years old

Volunteers: Accepts Healthy Volunteers

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.

Trial design

60 participants in 2 patient groups

Female CrossFitters

Description:

Crossfit practitioners born as female

Treatment:

Other: Quadriceps maximal voluntary isometric contraction

Other: Hamstrings maximal voluntary isometric contraction.

Male CrossFitters

Description:

Crossfit practitioners born as male

Treatment:

Other: Quadriceps maximal voluntary isometric contraction

Other: Hamstrings maximal voluntary isometric contraction.