There were no statistically significant between-group differences in changes in cartilage loss , synovitis or effusion at the follow-up ( analysis of covariance ; ANCOVA , P > @ ) , while there was an increased number of medial tibiofemoral BMLs in the exercise group ( ANCOVA , P = @ ) compared to both diet ( difference : -@ -LSB- @ % CI -@ : -@ -RSB- ) and `` no attention '' ( difference : -@ -LSB- @ % CI -@ : -@ -RSB- ) groups .