hello ,
was going through ur conversation i would like to make some suggestions, just move the limb passively in knee flexion and extension , it seems that both r tight , start with stretching of about 30 min each muscle ,if u wanna lenghtening of muscles by lengthening of sarcomere.......as the results r slow so have some patience u will c the results,no heel strike suggests that the TA might be tight too, does the patient goes for hyperextension of knee in the midstance if he tries to extend the knee,also check the hip flexors may be thay r holding the leg stiff if they r tight ........ hope u will find ur answer.....
thx