RESULTS	Total AOFAS Ankle-Hindfoot score of OA patients has improved in both groups , varying from 61.6 + / -16.8 to 90.1 + / -9.7 with HA treatment and from 72.1 + / -16.6 to 87.5 + / -17.5 using exercise therapy at the end of the trial ( p < 0.01 ) .\