Recent research has shown that refl

Recent research has shown that reflexive hamstring
activation may be important in knee stabilization after
ACL injury [28,29] and that training with support surface
perturbations may improve the reaction time of
hamstring activation [28,30]. In contrast, our results suggest
that a coupling between quadriceps activity and
activity of the hamstrings and soleus occurs after training
to improve dynamic knee stability during walking. By
providing controlled opportunities to dynamically stabilize
the knee via support surface perturbations, reflex
pathways are modulated to allow these relationships to
be formed.