A professional flamenco dancer will perform a ZAP 3 test, a sequence of single strikes of the feet performed continuously for 15 sec. Kinetic and kinematic studies will be recorded during the performance.

Flamenco is a highly emotional and sensitive dance, which is one of the most characteristic elements of Spanish culture. It is both physically and mentally demanding, with the emphasis on footwork technical execution and the aesthetic of arms and trunk movements. Years of training are necessary to achieve any level of proficiency as professional flamenco dancer.

Therefore proper execution of the movements minimize the risk of injury accompanying foot - ground contact which was reported by several studies. The most suffering parts of the dancer's body are the cervical and lumbar spine, knee and foot.

Despite the growing number of studies on flamenco dancing, there is a lack of investigations focused on understanding how does the flamenco dancer's body work to mitigate an injury risk. Therefore, the purpose of this study is to examine the parameters related to this issue: vertical Ground Reaction Force, Centre of Mass displacements and knee joint kinematics of the supporting leg They will be registered and analyzed during footwork performance.

A female professional flamenco dancer will perform a footork test called ZAP-3. It is a sequence of single strikes of the feet performed continuously for 15 seconds as fast as possible. 3D lower extremity kinematic data is used to collected using a five-camera motion analysis system (Vicon; Oxford Metrics Ltd., Oxford, UK). Kistler force platform will use to record the Ground reaction forces .

Inclusion Criteria:

• Volunteer
• More than 15 years as proffesional flamenco dancer.
• More than 20 hours per week dancing flamenco

Exclusion Criteria:

• Not report any musculoskeletal or sub-acute injury prior to 12 months of the study.
• Not report any surgical intervention prior to 12 months of the study.

Female profesional flamenco dancer