The application of mechanical principles in the study of the internal and external forces acting on the human body and the effects produced by those forces.

The application of mechanical principles in the study of the internal and external forces acting on the human body and the effects produced by those forces.

The application of mechanical principles in the study of the internal and external forces acting on the human body and the effects produced by those forces.

The application of mechanical principles in the study of the internal and external forces acting on the human body and the effects produced by those forces.

The application of mechanical principles in the study of the internal and external forces acting on the human body and the effects produced by those forces.

The application of mechanical principles in the study of the internal and external forces acting on the human body and the effects produced by those forces.