Clinical trial NCT05500729: Hamstring/Quadriceps Ratio in CrossFit
Official title: Evaluation of Isometric Strength and Hamstring/Quadriceps Ratio in Healthy CrossFit Subjects
Study type: OBSERVATIONAL
Overall status: UNKNOWN
Conditions: Healthy Volunteers
Keywords: Healthy Volunteers
Muscle Strength
Hamstring Muscles
Quadriceps Muscles
Young Adult
Isometric Contraction
Muscle Strength Dynamometer
Human physical conditioning
Lead sponsor: Maimonides University
Sponsor class: OTHER
First posted: 2022-08-15
Enrollment: 60
Sex: ALL
Minimum age (years): 20
Maximum age (years): 40
Standard ages: ADULT
Accepts healthy volunteers: yes
Observational model: COHORT
Time perspective: CROSS_SECTIONAL
Sampling method: NON_PROBABILITY_SAMPLE
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.

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.


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.

Primary outcomes:
measure: Hamstrings maximal voluntary isometric contraction
timeFrame: Day 1
measure: Quadriceps maximal voluntary isometric contraction.
timeFrame: Day 1
Secondary outcomes:
measure: Hamstring / Quadriceps Ratio
timeFrame: Day 1
Other outcomes:
Locations:
city: Ciudad Autonoma de Buenos Aires
country: Argentina
facility: Maimonides University
state: Caba
Study officials:
References: