Phase 1: Inclusion criteria:Healthy volunteers, between 20 and 65 years old, with no cardiovascular, neurological, digestive, endocrine, renal, gynecological, respiratory, hematologic, infectious, dermatological, autoimmune or diagnosed musculoskeletal disease or functional limitations, with tissue integrity and BMI between 18.5 to 25.9 kg/cm2 without scars in the sacred, back-lumbar, trochanteric, heels, elbows and shoulder blades areas.