This research will determine the presence of groin pain in professional dancers, through a specific questionnaire on the hip joint. Two groups will be formed made up of dancers over 18 years of age, men and women; one with groin pain and one without groin pain. All participants will undergo a functional muscle ultrasound study, where the thickness of the abdominal muscles, lumbar multifidus and gluteus medius and minor will be evaluated, and the relationship between ultrasound neuromuscular changes and groin pain will be verified

The objective of the study is to shed light on the to the complexity of the Diagnosis that Groin Pain (GP) encloses, it is proposed to evaluate with Functional Muscular Ultrasonography Rehabilitative Ultrasound Imaging (RUSI), the layer thickness of the gluteal musculature of the hip and the abdominal and lumbar muscles on a sample of professional dancers over 18 years of age with GP to check if there are differences with professional dancers without GP.

Expected goals:

1. Identify the presence of GP in professional dancers.
2. To compare the ultrasound characteristics of the neuromuscular system between a sample of dancers with GP and a sample of dancers no GP.
3. Verify the relationship between ultrasound neuromuscular changes with GP.

Inclusion Criteria:

• Volunteer Professional dancers 18 years or older, and no maximum age limits

Exclusion Criteria:

• Not signing the informed consent

• Professional dancers of the National Ballet of Spain