An Overuse Foot Injury Model Based On Tissue Stress
Two critical questions that must be addressed by the clinician treating overuse injuries of the foot are:
These questions are difficult, if not impossible to answer. Individuals who exhibit the most profound foot deformties are often asymptomatic while those clients with relatively "normal" foot structures are often the patients with severe foot problems.
- What is the etiology of lower extremity overuse injuries?
- Can we predict which individuals will develop lower extremity overuse injuries?
A major factor that must be considered when determining the etiology of mechanical lower extremity overuse injuries is TISSUE STRESS.
STRESS to body tissues can occur in a variety of locations including:
GOAL OF PHYSICAL THERAPY TREATMENT IN CLIENTS WITH LOWER EXTREMITY OVERUSE INJURIES IS TO REDUCE TISSUE STRESS TO A TOLERABLE LEVEL.
In order to effectively treat tissue stress, the clinician must recognize the following factors that could lead to tissue stress:
TISSUE STRESS is also influenced by:
- Velocity of applied load
- fast (traumatic)
- slow-repetitive (overuse)
- Response time of dynamic stabilizers
LOAD - JOINT DISPLACEMENT CURVE
TO ILLUSTRATE THE TISSUE STRESS MODEL