Apuntes de Fisica series, Vol. I: Palancas y la Actividad Terapeutica; IPETH Institute, Mexico City. This series is addressed to support Health Sciences' students as well Physical Therapists, in physical subjects related to Health Sciences. In this volume leverages and locomotion of human body are reviewed from a basic introductory level. Leverages physics are presented and related to physical therapeutic activities. Examples and figures are provided."