Biomechanics is the study of the structure and function of biological systems such as humans, animals, plants, organs, and cells by means of the methods of mechanics.

In other words, Biomechanics is the study of the mechanical laws relating to the structure or movement of living organisms. It involves factors such as how the body applies force on itself and to other bodies which it comes into contact with.

Examples:

The biomechanics of the squat includes consideration of the position and/or movement of the feet, hips, knees, back and shoulders and arms.