In any report that includes risk movement you can change the range of movement that is displayed. To do this when running a risk report (follow the link above for more help on accessing risk reports) you can check below the filters to see a section labelled Data:
If you tick the box next to Risk Review Only then the risk movement displayed in the report will only be for the scheduled risk reviews. If you leave it unticked then the risk movement displayed will reflect every time the risk was updated.