The Biomechanical Model for Minimum Movement Time during Running and Walking 04 - The Sum of Joint Linear Speeds Principle

The third fundamental Biomechanical Principle included in Biomechanical Model for Minimum Movement Time during Running and Walking is the Sum of Joint Linear Speeds Principle.  This principle states that the linear speed of any point on the human body is the summation of linear speeds at that point caused by individual joint angular velocities.  In general terms, any joint angular velocity will cause all points on a rotating body segment connected at the joint, and all points on any body segment attached to that rotating body segment, to move with linear speed.  A second or a third joint's angular velocity will do the same.     The linear speed of any common body segment will then be sum (addition) of the linear speeds of segment caused by each individual joint's angular velocity.

Click on "read more" to view my description of the Real-World Application of the Sum of Joint Linear Speeds principle to the Running and Walking Biomechanical Model for Minimum Movement Time.

The Biomechanical Model for Minimum Movement Time during Running and Walking 03 - The Linear Conservation of Momentum Principle

The Linear Conservation of Momentum Principle is the second fundamental Biomechanical principle included in the Biomechanical Model for Running and Walking to achieve minimum movement time.  This principle is derived from Newton’s First Law of Motion (Linear).  This principle states that to maintain a constant state of motion, any factors that would slow the body down must be balanced by factors that speed the body up.  If the factors that slow the body down exceed the factors that speed the body up, the body slows down (i.e., the state of motion changes).  If the factors that slow the body down are less than the factors that speed the body up, the body speeds up (i.e., the state of motion changes).

Click on "read more" to see a graphical representation the Linear Conservation of Momentum Principle.