Quadriceps Dysfunction in Patello Femoral Pain Syndrome
There exists a lack of consensus determining the etiology of Quadriceps Dysfunction in Patello Femoral Pain Syndrome (PFPS). It is suggested that multifactorial causes for PFPS exist. For example: Quadriceps muscle mass can be reduced due to Vastus medialis atrophy causing Quadriceps strength deficiency or altered Quadriceps recruitment patterns. Abnormal activation patterns due to deficient neuromuscular imbalance causing Vastus lateralis to contract earlier than Vastus Medialis Oblique resulting in a lateral directed force on the patella and abnormal patella tracking has also been suggested. Thus abnormal activation patterns due to a deficient neuromuscular pattern has been considered. Continue reading
The main symptoms are pain and stiffness of the tendon, just above your heel bone. It usually develops gradually and may be more noticeable after a period of rest, such as first thing in the morning. The pain may improve with exercise to begin with. Over time, symptoms may worsen; you may start to experience pain after exercise and finally pain during exercise. The tendon above your heel may appear slightly swollen and feel stiff. 
