Make your own free website on

Exercise Science Portfolio
The Seven Biomechanical Principles


Newton's Laws
Types of Motion
The Seven Biomechanical Principles
Human Growth and Development
Stages of Human Development
Motor Development
Skill Acquisition
Motor Learning Concepts
Skill Acquisition Process

Biomechanic Principles

The seven principles are: 1.) Stability, 2.) Maximum Force, 3.) Maximum Velocity, 4.) Applied Impulse, 5.) Direction, 6.) Angular Motion, 7.) Angular Momentum


Principle #1- Stability
There are two types of stability:
1.) Linear
a.) Static- at rest a persom:s lionear stibaitltu is proptonial to the mass and the fricitonal forces orruttin between the person and any supporting  surfaces.
b.) Dynamic-  While moviung a person's linear stability is directly related to momentum.  The heavier the and athlete and the faster his movements, the greater the person's linear stability.
2.) Rotary
a.) Resistance against being pushed over
b.) Resistance of rotating an object or person against a reduction in rate of spin.
The lower the centre of gravity the lager the base of support, the closer the line of gravity to the centre of the base of support, and the greater the mass the more stability.
Principle #2- Maximum Force
In order for maximum force to be produced it requires the use of as many joints in the body possible.
Principle #3- Maximum Velocity
For maximum velocity to be produced it requires the use of the joints from largest to smallest.  Leaving out one joint can reduce the overall force.
Principle #4- Applied Impulse
The greater the applied impulse, the greater the increase in velocity.
Impulse= Force x Time
Principle #5- Direction

Movement usually occurs in the direction opposite to the applied force.
Principle #6- Angular Motion
Angular motion is produced by the application of a force acting at a distance from an axis, by means of torque.  Angular momentum increases the closer the force is to the axis.
Principle #7- Angular Momentum
This principle refers to constant momentum when and athlete or object is free in the air.