Inclusion Criteria:  Male and female physiotherapy students over 18 years of age who regularly attend face-to-face classes who have a mobility pass and a health declaration. Students who read and sign the informed consent.  Exclusion Criteria:  Orthognathic surgery.  Recent head and neck injury or fracture (equal to or less than 3 months) Dental or medical diagnosis of mandibular disorder or manifest facial pain. Contraindication (red flag) to perform high speed and low amplitude cervical manipulation (bone cancer, osteoporosis, vertebral artery injury, etc.)