Predictable movement

Fixed to floor

-relativly low velocity, generates large force

-Ex:walking standing, running, jumping

Not fixed to the ground.

Tend to produce high velocity movements

-Relativly low forces, generates high velocities

ex: kicking, throwing, running walking

Applies to two joint musucles only becasue the muscle goes through concentric and eccentric lengthening all at the same time at different ends.

i.e. rectus femoris

-gives us a predictable pattern.

↑ compressive forces
↑ joint congruency
↓ shear forces
↓ acceleration forces
Stimulation of proprioceptors
↑ dynamic stability

-Tendency for substitution of larger muscles rather than correct use of weaker muscle

↑ acceleration forces
↓ resistance forces
↑ distraction and rotational forces
↑ deformation of joint and muscle mechanoreceptors
Concentric acceleration & eccentric deceleration forces
Promotion of functional activities

-Can be initiated prior to full weight bearing